[Samsung Galaxy Tab S6 Lite Questions & Answers] PatrykMis:
SM-P610, LineageOS. The device started to output laggy sound. After restart, it doesn't want to boot anymore because of bootloop. While trying to boot without the cable, it enters rescue mode where I can reboot or factory reset, so I modified build.prop to gather logs. Below the most inportant part:

Logcat:

5101 5101 E System : ******************************************
5101 5101 E System : ************ Failure starting system services
5101 5101 E System : java.lang.RuntimeException: Failed to boot service com.android.server.content.ContentService$Lifecycle: onBootPhase threw an exception during phase 550
5101 5101 E System : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:297)
5101 5101 E System : at com.android.server.SystemServer.lambda$startOtherServices$5$com-android-server-SystemServer(SystemServer.java:2820)
5101 5101 E System : at com.android.server.SystemServer$$ExternalSyntheticLambda7.run(Unknown Source:30)
5101 5101 E System : at com.android.server.am.ActivityManagerService.systemReady(ActivityManagerService.java:8209)
5101 5101 E System : at com.android.server.SystemServer.startOtherServices(SystemServer.java:2817)
5101 5101 E System : at com.android.server.SystemServer.run(SystemServer.java:940)
5101 5101 E System : at com.android.server.SystemServer.main(SystemServer.java:650)
5101 5101 E System : at java.lang.reflect.Method.invoke(Native Method)
5101 5101 E System : at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
5101 5101 E System : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914)
5101 5101 E System : Caused by: android.util.proto.ProtoParseException: Unexpected wire type: 6 at offset 0x3
5101 5101 E System : mFieldNumber : 0xe7b
5101 5101 E System : mWireType : 0x6
5101 5101 E System : mState : 0x1
5101 5101 E System : mDiscardedBytes : 0x0
5101 5101 E System : mOffset : 0x3
5101 5101 E System : mExpectedObjectTokenStack : null
5101 5101 E System : mDepth : 0xffffffff
5101 5101 E System : mBuffer : [B@bbf1525
5101 5101 E System : mBufferSize : 0x2000
5101 5101 E System : mEnd : 0xac
5101 5101 E System : at android.util.proto.ProtoInputStream.skip(ProtoInputStream.java:838)
5101 5101 E System : at android.util.proto.ProtoInputStream.nextField(ProtoInputStream.java:226)
5101 5101 E System : at com.android.server.content.SyncStorageEngine.readDayStatsLocked(SyncStorageEngine.java:2495)
5101 5101 E System : at com.android.server.content.SyncStorageEngine.readStatisticsLocked(SyncStorageEngine.java:2484)
5101 5101 E System : at com.android.server.content.SyncStorageEngine.<init>(SyncStorageEngine.java:547)
5101 5101 E System : at com.android.server.content.SyncStorageEngine.init(SyncStorageEngine.java:567)
5101 5101 E System : at com.android.server.content.SyncManager.<init>(SyncManager.java:574)
5101 5101 E System : at com.android.server.content.ContentService.getSyncManager(ContentService.java:214)
5101 5101 E System : at com.android.server.content.ContentService.onBootPhase(ContentService.java:343)
5101 5101 E System : at com.android.server.content.ContentService$Lifecycle.onBootPhase(ContentService.java:140)
5101 5101 E System : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:294)
5101 5101 E System : ... 9 more
5101 5101 V SystemServerTiming: OnBootPhase_550 took to complete: 299ms
5101 5101 E Zygote : System zygote died with fatal exception
5101 5101 E Zygote : java.lang.RuntimeException: Failed to boot service com.android.server.content.ContentService$Lifecycle: onBootPhase threw an exception during phase 550
5101 5101 E Zygote : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:297)
5101 5101 E Zygote : at com.android.server.SystemServer.lambda$startOtherServices$5$com-android-server-SystemServer(SystemServer.java:2820)
5101 5101 E Zygote : at com.android.server.SystemServer$$ExternalSyntheticLambda7.run(Unknown Source:30)
5101 5101 E Zygote : at com.android.server.am.ActivityManagerService.systemReady(ActivityManagerService.java:8209)
5101 5101 E Zygote : at com.android.server.SystemServer.startOtherServices(SystemServer.java:2817)
5101 5101 E Zygote : at com.android.server.SystemServer.run(SystemServer.java:940)
5101 5101 E Zygote : at com.android.server.SystemServer.main(SystemServer.java:650)
5101 5101 E Zygote : at java.lang.reflect.Method.invoke(Native Method)
5101 5101 E Zygote : at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
5101 5101 E Zygote : at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914)
5101 5101 E Zygote : Caused by: android.util.proto.ProtoParseException: Unexpected wire type: 6 at offset 0x3
5101 5101 E Zygote : mFieldNumber : 0xe7b
5101 5101 E Zygote : mWireType : 0x6
5101 5101 E Zygote : mState : 0x1
5101 5101 E Zygote : mDiscardedBytes : 0x0
5101 5101 E Zygote : mOffset : 0x3
5101 5101 E Zygote : mExpectedObjectTokenStack : null
5101 5101 E Zygote : mDepth : 0xffffffff
5101 5101 E Zygote : mBuffer : [B@bbf1525
5101 5101 E Zygote : mBufferSize : 0x2000
5101 5101 E Zygote : mEnd : 0xac
5101 5101 E Zygote : at android.util.proto.ProtoInputStream.skip(ProtoInputStream.java:838)
5101 5101 E Zygote : at android.util.proto.ProtoInputStream.nextField(ProtoInputStream.java:226)
5101 5101 E Zygote : at com.android.server.content.SyncStorageEngine.readDayStatsLocked(SyncStorageEngine.java:2495)
5101 5101 E Zygote : at com.android.server.content.SyncStorageEngine.readStatisticsLocked(SyncStorageEngine.java:2484)
5101 5101 E Zygote : at com.android.server.content.SyncStorageEngine.<init>(SyncStorageEngine.java:547)
5101 5101 E Zygote : at com.android.server.content.SyncStorageEngine.init(SyncStorageEngine.java:567)
5101 5101 E Zygote : at com.android.server.content.SyncManager.<init>(SyncManager.java:574)
5101 5101 E Zygote : at com.android.server.content.ContentService.getSyncManager(ContentService.java:214)
5101 5101 E Zygote : at com.android.server.content.ContentService.onBootPhase(ContentService.java:343)
5101 5101 E Zygote : at com.android.server.content.ContentService$Lifecycle.onBootPhase(ContentService.java:140)
5101 5101 E Zygote : at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:294)
5101 5101 E Zygote : ... 9 more
5101 5101 D AndroidRuntime: Shutting down VM
--------- beginning of crash
5101 5101 E AndroidRuntime: *** FATAL EXCEPTION IN SYSTEM PROCESS: main
5101 5101 E AndroidRuntime: java.lang.RuntimeException: Failed to boot service com.android.server.content.ContentService$Lifecycle: onBootPhase threw an exception during phase 550
5101 5101 E AndroidRuntime: at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:297)
5101 5101 E AndroidRuntime: at com.android.server.SystemServer.lambda$startOtherServices$5$com-android-server-SystemServer(SystemServer.java:2820)
5101 5101 E AndroidRuntime: at com.android.server.SystemServer$$ExternalSyntheticLambda7.run(Unknown Source:30)
5101 5101 E AndroidRuntime: at com.android.server.am.ActivityManagerService.systemReady(ActivityManagerService.java:8209)
5101 5101 E AndroidRuntime: at com.android.server.SystemServer.startOtherServices(SystemServer.java:2817)
5101 5101 E AndroidRuntime: at com.android.server.SystemServer.run(SystemServer.java:940)
5101 5101 E AndroidRuntime: at com.android.server.SystemServer.main(SystemServer.java:650)
5101 5101 E AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
5101 5101 E AndroidRuntime: at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
5101 5101 E AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:914)
5101 5101 E AndroidRuntime: Caused by: android.util.proto.ProtoParseException: Unexpected wire type: 6 at offset 0x3
5101 5101 E AndroidRuntime: mFieldNumber : 0xe7b
5101 5101 E AndroidRuntime: mWireType : 0x6
5101 5101 E AndroidRuntime: mState : 0x1
5101 5101 E AndroidRuntime: mDiscardedBytes : 0x0
5101 5101 E AndroidRuntime: mOffset : 0x3
5101 5101 E AndroidRuntime: mExpectedObjectTokenStack : null
5101 5101 E AndroidRuntime: mDepth : 0xffffffff
5101 5101 E AndroidRuntime: mBuffer : [B@bbf1525
5101 5101 E AndroidRuntime: mBufferSize : 0x2000
5101 5101 E AndroidRuntime: mEnd : 0xac
5101 5101 E AndroidRuntime: at android.util.proto.ProtoInputStream.skip(ProtoInputStream.java:838)
5101 5101 E AndroidRuntime: at android.util.proto.ProtoInputStream.nextField(ProtoInputStream.java:226)
5101 5101 E AndroidRuntime: at com.android.server.content.SyncStorageEngine.readDayStatsLocked(SyncStorageEngine.java:2495)
5101 5101 E AndroidRuntime: at com.android.server.content.SyncStorageEngine.readStatisticsLocked(SyncStorageEngine.java:2484)
5101 5101 E AndroidRuntime: at com.android.server.content.SyncStorageEngine.<init>(SyncStorageEngine.java:547)
5101 5101 E AndroidRuntime: at com.android.server.content.SyncStorageEngine.init(SyncStorageEngine.java:567)
5101 5101 E AndroidRuntime: at com.android.server.content.SyncManager.<init>(SyncManager.java:574)
5101 5101 E AndroidRuntime: at com.android.server.content.ContentService.getSyncManager(ContentService.java:214)
5101 5101 E AndroidRuntime: at com.android.server.content.ContentService.onBootPhase(ContentService.java:343)
5101 5101 E AndroidRuntime: at com.android.server.content.ContentService$Lifecycle.onBootPhase(ContentService.java:140)
5101 5101 E AndroidRuntime: at com.android.server.SystemServiceManager.startBootPhase(SystemServiceManager.java:294)
5101 5101 E AndroidRuntime: ... 9 more
5101 5101 I DropBoxManagerService: add tag=system_server_crash isTagEnabled=true flags=0x2
5101 5101 I Process : Sending signal. PID: 5101 SIG: 9
4863 4863 E Zygote : Zygote failed to write to system_server FD: Connection refused
4863 4863 I Zygote : Process 5101 exited due to signal 9 (Killed)
4863 4863 E Zygote : Exit zygote because system server (pid 5101) has terminated

If it's not possible to boot this system anymore, I'd like to decrypt and recover /sdcard data at least, because FBE was enabled. Thank you very much in advance for your help!