[LG V20 Questions & Answers] Electronicbrain:
I ran a logcat when it occured

Line 233: 03-14 17:24:36.461 17279 17279 E AndroidRuntime:	at com.lge.iftttmanager.smartsetting.SmartSettingPreference.updateBTStates(SmartSettingPreference.java:409)

Line 234: 03-14 17:24:36.461 17279 17279 E AndroidRuntime:	at com.lge.iftttmanager.processor.CommonIntentProcessor.processBTChanged(CommonIntentProcessor.java:42)

Line 600: 03-14 17:42:28.074 1493 1493 D BluetoothManagerService: BluetoothServiceConnection, disconnected: com.android.bluetooth.btservice.AdapterService

Line 605: 03-14 17:42:28.079 1493 1852 W ActivityManager: Scheduling restart of crashed service com.android.bluetooth/.btservice.AdapterService in 11000ms

Line 610: 03-14 17:42:28.080 1493 1852 W ActivityManager: Scheduling restart of crashed service com.android.bluetooth/com.broadcom.bt.service.opp.OppService in 20999ms

Line 655: 03-14 17:42:28.796 1493 1493 D BluetoothManagerService: BluetoothServiceConnection: com.android.bluetooth.btservice.AdapterService

Line 1704: 03-14 17:45:46.582 1493 2770 I SystemUI[Framework]: ==>disabledNaviBtnLocked() userId=0, what=0x70006, token=android.os.BinderProxy@f68396d, pkg=com.android.systemui

Line 1705: 03-14 17:45:46.582 1493 2770 I SystemUI[Framework]: disableNaviBtn: mDisabledNaviBtn=0x70006, mDisableRecords.size=1

Line 1705: 03-14 17:45:46.582 1493 2770 I SystemUI[Framework]: disableNaviBtn: mDisabledNaviBtn=0x70006, mDisableRecords.size=1

Line 3868: 03-14 17:50:24.709 1493 2721 I SystemUI[Framework]: ==>disabledNaviBtnLocked() userId=0, what=0x0, token=android.os.BinderProxy@f68396d, pkg=com.android.systemui

Line 3869: 03-14 17:50:24.709 1493 2721 I SystemUI[Framework]: disableNaviBtn: mDisabledNaviBtn=0x0, mDisableRecords.size=0

Line 3869: 03-14 17:50:24.709 1493 2721 I SystemUI[Framework]: disableNaviBtn: mDisabledNaviBtn=0x0, mDisableRecords.size=0

Line 3979: 03-14 17:50:33.092 1493 1493 D BluetoothManagerService: BluetoothServiceConnection, disconnected: com.android.bluetooth.btservice.AdapterService

Line 3981: 03-14 17:50:33.097 2693 2693 D LGBluetoothAPIService: [BTUI] LGBluetoothAPIServiceConnection: disconnected from LGBluetoothAPIAdapter

Line 3989: 03-14 17:50:33.099 1493 1493 D AudioService: mConnectedBTDevicesList size 0

Line 3991: 03-14 17:50:33.100 1493 4348 W ActivityManager: Scheduling restart of crashed service com.android.bluetooth/.btservice.AdapterService in 11000ms

Line 4005: 03-14 17:50:33.108 1493 4348 W ActivityManager: Scheduling restart of crashed service com.android.bluetooth/com.broadcom.bt.service.opp.OppService in 30993ms

Line 4008: 03-14 17:50:33.120 1493 1493 D AudioService: mConnectedBTDevicesList size 0

Line 4014: 03-14 17:50:33.126 2693 2693 D LGBluetoothAPIService: [BTUI] onReceive action : android.bluetooth.adapter.action.STATE_CHANGED

Line 4053: 03-14 17:50:33.386 1493 3501 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.hfp.HeadsetService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4054: 03-14 17:50:33.387 1493 3393 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.a2dp.A2dpService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4055: 03-14 17:50:33.387 1493 1564 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.hid.HidService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4056: 03-14 17:50:33.387 1493 2760 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.hdp.HealthService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4057: 03-14 17:50:33.388 1493 2721 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.pan.PanService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4058: 03-14 17:50:33.388 1493 3377 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.gatt.GattService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4059: 03-14 17:50:33.389 1493 1852 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.map.BluetoothMapService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4060: 03-14 17:50:33.389 1493 3410 V LGSettingsProvider: call_put(global:bt_svcst_com.broadcom.bt.service.opp.OppService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4060: 03-14 17:50:33.389 1493 3410 V LGSettingsProvider: call_put(global:bt_svcst_com.broadcom.bt.service.opp.OppService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4061: 03-14 17:50:33.389 1493 3508 V LGSettingsProvider: call_put(global:bt_svcst_init=1) calling package = com.android.bluetooth callingUserId : 0

Line 4069: 03-14 17:50:33.530 1493 1493 D BluetoothManagerService: BluetoothServiceConnection: com.android.bluetooth.btservice.AdapterService

Line 4095: 03-14 17:50:33.620 2693 2693 D LGBluetoothAPIService: [BTUI] LGBluetoothAPIServiceConnection: connected to LGBluetoothAPIAdapter

Line 4143: 03-14 17:50:34.554 2693 2693 D LGBluetoothAPIService: [BTUI] onReceive action : android.bluetooth.adapter.action.STATE_CHANGED

Line 4147: 03-14 17:50:34.626 24574 24574 D LGBluetoothProfileConnectionReceiver_LGSettingsAPK: [BTUI] STATE_OFF or STATE_TURNING_ON : reset connected device information - BluetoothSettings

Line 4149: 03-14 17:50:34.629 24574 24574 D LGBluetoothProfileConnectionReceiver_EasySetting: [BTUI] STATE_OFF or STATE_TURNING_ON : reset connected device information EasySettings

Line 4172: 03-14 17:50:34.961 2693 2693 D LGBluetoothAPIService: [BTUI] onReceive action : android.bluetooth.adapter.action.STATE_CHANGED

Line 4272: 03-14 17:50:38.616 1493 1493 D WifiServerServiceExt: Connected BT device : 29

Line 4436: 03-14 17:50:57.197 1493 1493 D AudioService: mConnectedBTDevicesList size 0

Line 4443: 03-14 17:50:57.199 2693 2693 D LGBluetoothAPIService: [BTUI] LGBluetoothAPIServiceConnection: disconnected from LGBluetoothAPIAdapter

Line 4449: 03-14 17:50:57.200 1493 3508 W ActivityManager: Scheduling restart of crashed service com.android.bluetooth/.btservice.AdapterService in 10999ms

Line 4458: 03-14 17:50:57.201 1493 3508 W ActivityManager: Scheduling restart of crashed service com.android.bluetooth/com.broadcom.bt.service.opp.OppService in 20997ms

Line 4462: 03-14 17:50:57.203 1493 1493 D BluetoothManagerService: BluetoothServiceConnection, disconnected: com.android.bluetooth.btservice.AdapterService

Line 4485: 03-14 17:50:57.221 1493 1493 D AudioService: mConnectedBTDevicesList size 0

Line 4486: 03-14 17:50:57.221 2693 2693 D LGBluetoothAPIService: [BTUI] onReceive action : android.bluetooth.adapter.action.STATE_CHANGED

Line 4492: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4493: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4494: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4495: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4496: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4497: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4498: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4499: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4500: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4501: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4502: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4503: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4504: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4505: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4506: 03-14 17:50:57.230 24574 24574 E BluetoothDevice: BT not enabled. Cannot get bond state

Line 4543: 03-14 17:50:57.402 1493 3432 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.hfp.HeadsetService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4544: 03-14 17:50:57.402 1493 2760 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.a2dp.A2dpService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4545: 03-14 17:50:57.402 1493 2480 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.hid.HidService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4546: 03-14 17:50:57.403 1493 1852 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.hdp.HealthService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4547: 03-14 17:50:57.403 1493 3398 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.pan.PanService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4548: 03-14 17:50:57.403 1493 3501 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.gatt.GattService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4549: 03-14 17:50:57.404 1493 3474 V LGSettingsProvider: call_put(global:bt_svcst_com.android.bluetooth.map.BluetoothMapService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4550: 03-14 17:50:57.404 1493 1564 V LGSettingsProvider: call_put(global:bt_svcst_com.broadcom.bt.service.opp.OppService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4550: 03-14 17:50:57.404 1493 1564 V LGSettingsProvider: call_put(global:bt_svcst_com.broadcom.bt.service.opp.OppService=1) calling package = com.android.bluetooth callingUserId : 0

Line 4551: 03-14 17:50:57.404 1493 2721 V LGSettingsProvider: call_put(global:bt_svcst_init=1) calling package = com.android.bluetooth callingUserId : 0

Line 4558: 03-14 17:50:57.475 1493 1493 D BluetoothManagerService: BluetoothServiceConnection: com.android.bluetooth.btservice.AdapterService

Line 4563: 03-14 17:50:57.517 2693 2693 D LGBluetoothAPIService: [BTUI] LGBluetoothAPIServiceConnection: connected to LGBluetoothAPIAdapter

Line 4612: 03-14 17:50:58.607 2693 2693 D LGBluetoothAPIService: [BTUI] onReceive action : android.bluetooth.adapter.action.STATE_CHANGED

Line 4617: 03-14 17:50:58.757 24574 24574 D LGBluetoothProfileConnectionReceiver_LGSettingsAPK: [BTUI] STATE_OFF or STATE_TURNING_ON : reset connected device information - BluetoothSettings

Line 4619: 03-14 17:50:58.761 24574 24574 D LGBluetoothProfileConnectionReceiver_EasySetting: [BTUI] STATE_OFF or STATE_TURNING_ON : reset connected device information EasySettings

Line 4640: 03-14 17:50:58.927 2693 2693 D LGBluetoothAPIService: [BTUI] onReceive action : android.bluetooth.adapter.action.STATE_CHANGED

Line 4746: 03-14 17:51:01.307 1493 1493 D WifiServerServiceExt: Connected BT device : 30