[OnePlus 6T  ROMs, Kernels, Recoveries, & Other Dev] stackmagic:
Same issue here - Upgraded from 9. Dec Version to 14. Dec...

Here I enter my pin and am presented with the screen telling me to find the fingerprint sensor on the screen

12-14 19:47:38.362 925 925 D keystore: AddAuthenticationToken: timestamp = 1326897, time_received = 722
12-14 19:47:38.390 925 925 I keystore: 1 0
12-14 19:47:38.407 877 1056 W BroadcastQueue: Background execution not allowed: receiving Intent { act=android.intent.action.DROPBOX_ENTRY_ADDED flg=0x10 (has extras) } to com.google.android.gms/.stats.service.DropBoxEntryAddedReceiver
12-14 19:47:38.407 877 1056 W BroadcastQueue: Background execution not allowed: receiving Intent { act=android.intent.action.DROPBOX_ENTRY_ADDED flg=0x10 (has extras) } to com.google.android.gms/.chimera.GmsIntentOperationService$PersistentTrustedReceiver
12-14 19:47:38.428 925 925 D keystore: AddAuthenticationToken: timestamp = 1326963, time_received = 722
12-14 19:47:38.450 925 925 D keystore: AddAuthenticationToken: timestamp = 1326985, time_received = 723
12-14 19:47:38.453 925 925 I keystore: calling unlock when already unlocked, ignoring.
12-14 19:47:38.454 877 6089 I LockSettingsService: Unlocking user 0 with secret only, length 32
12-14 19:47:38.454 877 6089 D LockSettingsService: unlockUser finished
12-14 19:47:38.454 877 6089 I LockSettingsService: Disabling escrow token on user 0
12-14 19:47:38.455 877 6089 I LockSettingsService: Caching SP for user 0
12-14 19:47:38.463 877 877 I LockSettingsService: Removing SP from cache for user 0
12-14 19:47:38.467 877 2787 D KeySyncTask: Key sync not needed.
12-14 19:47:38.487 877 877 V FingerprintService: starting client EnrollClient(com.android.settings), initiatedByClient = true
12-14 19:47:38.488 995 995 D : vendor updateStatus 4
12-14 19:47:38.489 995 995 D : vendor updateStatus 8
12-14 19:47:38.489 995 995 V android.hardware.biometrics.fingerprint@2.1-service: enroll(gid=0, timeout=60)
12-14 19:47:38.489 995 995 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintTp startTPDetect
12-14 19:47:38.489 995 995 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintEvent queue 0
12-14 19:47:38.489 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: set_fp_en 1
12-14 19:47:38.490 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent size 1 0 needup 0 mode 1 result 0
12-14 19:47:38.490 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent loop 0
12-14 19:47:38.500 995 995 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:38.500 995 995 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintMsgThread queue
12-14 19:47:38.500 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:38.500 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintmsg loop
12-14 19:47:38.538 1842 1842 I PhenotypeExperimentConfiguration: refreshConfiguration() : Force = false : UpdateAvailable = false : Age = 21 minutes : MaxAge = 720 minutes
12-14 19:47:38.539 1842 1842 I AndroidIME: DummyIme.onDeactivate()
12-14 19:47:38.568 708 1246 I sensors-hal: batch:129, android.sensor.light/43, period=200000000, max_latency=0
12-14 19:47:38.569 708 1246 I sensors-hal: batch:138, android.sensor.light/43, period=200000000, max_latency=0 request completed

Here I'm pressing the finger down on the sensor and lift it twice

12-14 19:47:41.415 688 715 I FingerprintInscreenService: dimAmount = 182
12-14 19:47:41.431 719 719 D : OneplusDisplay::setMode is OK mode=8 enable= 2
12-14 19:47:41.465 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintEvent queue 1
12-14 19:47:41.465 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: finger down
12-14 19:47:41.465 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: wait finger up
12-14 19:47:41.465 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent size 1 1 needup 0 mode 1 result 0
12-14 19:47:41.465 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent down
12-14 19:47:41.465 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=4
12-14 19:47:41.465 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:41.465 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent loop 0
12-14 19:47:41.465 995 1532 E [GF_HAL][Authenticator]: [onEnrollDownEvt]group id = 0.
12-14 19:47:41.465 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:41.465 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintMsgThread queue
12-14 19:47:41.466 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:41.466 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintmsg loop
12-14 19:47:41.467 6704 6704 W FingerprintManager: Invalid acquired message: 6, 2
12-14 19:47:41.540 719 719 D : OneplusDisplay::setMode is OK mode=10 enable= 1
12-14 19:47:41.572 719 719 D : OneplusDisplay::setMode is OK mode=9 enable= 1
12-14 19:47:41.577 688 715 I FingerprintInscreenService: dimAmount = 182
12-14 19:47:41.589 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=6
12-14 19:47:41.693 995 1532 E [CaEntry]: [sendCommand] QSEE TEE execute command failed.
12-14 19:47:41.688 995 995 W EventCenterThre: type=1400 audit(0.0:583): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14385 scontext=u:r:hal_fingerprint_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
12-14 19:47:41.694 995 1532 E [CaEntry]: [sendCommand] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:41.694 995 1532 E [GF_HAL][Algo]: [enrollImage] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:41.694 995 1532 E [GF_HAL][Authenticator]: [notifyErrorInfo] err code : 1006.
12-14 19:47:41.694 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: onError(8)
12-14 19:47:41.694 995 1532 E libc : Access denied finding property "gf.debug.dump_data"
12-14 19:47:41.695 877 877 V FingerprintService: Done with client: com.android.settings
12-14 19:47:41.695 877 877 V FingerprintService: handleError(client=com.android.settings, error = 8)
12-14 19:47:41.695 6704 6704 W FingerprintManager: Invalid error message: 8, 6
12-14 19:47:41.712 995 1532 E [GF_HAL][TestUtils]: [onMessage] alloced memery larger than used, used=6424, malloc=6432
12-14 19:47:41.712 995 1532 E [GF_HAL][Authenticator]: [onEnrollStop] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:41.712 995 1532 E [GF_HAL][Authenticator]: [onEnrollDownEvt] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:41.712 995 1532 E [GF_HAL][Authenticator]: [onEnrollEvt] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:41.712 995 1532 E [GF_HAL][Authenticator]: [onEvent] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:42.165 719 719 D : OneplusDisplay::setMode is OK mode=8 enable= 0
12-14 19:47:42.168 719 719 D : OneplusDisplay::setMode is OK mode=10 enable= 0
12-14 19:47:42.168 719 719 D : OneplusDisplay::setMode is OK mode=9 enable= 0
12-14 19:47:42.172 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=7
12-14 19:47:42.186 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintEvent queue 2
12-14 19:47:42.187 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: finger up
12-14 19:47:42.187 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintEvent getStandby
12-14 19:47:42.187 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: wait finger down
12-14 19:47:42.187 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent size 1 2 needup 1 mode 1 result 0
12-14 19:47:42.187 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent up, result 0
12-14 19:47:42.187 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:42.187 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent loop 0
12-14 19:47:42.187 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=5
12-14 19:47:42.187 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:42.187 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintMsgThread queue
12-14 19:47:42.188 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:42.188 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintmsg loop
12-14 19:47:42.649 915 1088 I ThermalEngine: Monitor : quiet_therm = 29954, msm_therm = 31274, xo_therm = 31323, battery_therm = 294,current_now = 286000
12-14 19:47:43.334 688 715 I FingerprintInscreenService: dimAmount = 182
12-14 19:47:43.346 719 719 D : OneplusDisplay::setMode is OK mode=8 enable= 2
12-14 19:47:43.384 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintEvent queue 1
12-14 19:47:43.384 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: finger down
12-14 19:47:43.384 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: wait finger up
12-14 19:47:43.384 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=4
12-14 19:47:43.384 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent size 1 1 needup 0 mode 1 result 0
12-14 19:47:43.384 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent down
12-14 19:47:43.384 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:43.384 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent loop 0
12-14 19:47:43.385 995 1532 E [GF_HAL][Authenticator]: [onEnrollDownEvt]group id = 0.
12-14 19:47:43.385 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:43.385 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintMsgThread queue
12-14 19:47:43.385 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:43.385 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintmsg loop
12-14 19:47:43.455 719 719 D : OneplusDisplay::setMode is OK mode=10 enable= 1
12-14 19:47:43.472 719 719 D : OneplusDisplay::setMode is OK mode=9 enable= 1
12-14 19:47:43.477 688 715 I FingerprintInscreenService: dimAmount = 182
12-14 19:47:43.505 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=6
12-14 19:47:43.614 995 1532 E [CaEntry]: [sendCommand] QSEE TEE execute command failed.
12-14 19:47:43.614 995 1532 E [CaEntry]: [sendCommand] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:43.614 995 1532 E [GF_HAL][Algo]: [enrollImage] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:43.614 995 1532 E [GF_HAL][Authenticator]: [notifyErrorInfo] err code : 1006.
12-14 19:47:43.615 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: onError(8)
12-14 19:47:43.612 995 995 W EventCenterThre: type=1400 audit(0.0:584): avc: denied { read } for name="u:object_r:default_prop:s0" dev="tmpfs" ino=14385 scontext=u:r:hal_fingerprint_default:s0 tcontext=u:object_r:default_prop:s0 tclass=file permissive=0
12-14 19:47:43.615 995 1532 E libc : Access denied finding property "gf.debug.dump_data"
12-14 19:47:43.615 877 877 V FingerprintService: handleError(client=null, error = 8)
12-14 19:47:43.631 995 1532 E [GF_HAL][TestUtils]: [onMessage] alloced memery larger than used, used=6424, malloc=6432
12-14 19:47:43.632 995 1532 E [GF_HAL][Authenticator]: [onEnrollStop] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:43.632 995 1532 E [GF_HAL][Authenticator]: [onEnrollDownEvt] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:43.632 995 1532 E [GF_HAL][Authenticator]: [onEnrollEvt] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:43.632 995 1532 E [GF_HAL][Authenticator]: [onEvent] exit. err=GF_ERROR_INVALID_BASE, errno=1059
12-14 19:47:44.314 719 719 D : OneplusDisplay::setMode is OK mode=8 enable= 0
12-14 19:47:44.317 719 719 D : OneplusDisplay::setMode is OK mode=10 enable= 0
12-14 19:47:44.317 719 719 D : OneplusDisplay::setMode is OK mode=9 enable= 0
12-14 19:47:44.322 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=7
12-14 19:47:44.346 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintEvent queue 2
12-14 19:47:44.346 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: finger up
12-14 19:47:44.346 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintEvent getStandby
12-14 19:47:44.346 995 1699 D android.hardware.biometrics.fingerprint@2.1-service: wait finger down
12-14 19:47:44.346 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent size 1 2 needup 1 mode 1 result 0
12-14 19:47:44.346 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent up, result 0
12-14 19:47:44.346 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:44.347 995 1701 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintEvent loop 0
12-14 19:47:44.347 995 1536 E [GF_HAL][Device]: [handleNetlinkMessage] wrong netlink command value=5
12-14 19:47:44.347 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:44.347 995 1532 D android.hardware.biometrics.fingerprint@2.1-service: FingerprintMsgThread queue
12-14 19:47:44.347 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: onAcquired(6)
12-14 19:47:44.347 995 1698 D android.hardware.biometrics.fingerprint@2.1-service: fingerprintmsg loop
12-14 19:47:49.315 877 1138 E LightsService: Light requested not available on this device. 2