Happened to me here too. Built in integration. Just upgraded to 2021.1.1 and Home Assistant OS 5.10
2021-01-12 14:03:29.626 Detail,
2021-01-12 14:03:29.626 Detail, Node031, Removing current message
2021-01-12 14:03:29.626 Detail, Node031, Notification: ValueChanged
2021-01-12 14:03:58.117 Info, mgr, Manager::WriteConfig completed for driver with home ID of 0xe9973468
2021-01-12 14:03:59.142 Info, mgr, Driver for controller /dev/ttyACM0 pending removal
2021-01-12 14:03:59.142 Detail, Notification: DriverRemoved
2021-01-12 14:03:59.142 Always, ***************************************************************************
2021-01-12 14:03:59.143 Always, ********************* Cumulative Network Statistics *********************
2021-01-12 14:03:59.143 Always, *** General
2021-01-12 14:03:59.143 Always, Driver run time: . . . 0 days, 1 hours, 12 minutes
2021-01-12 14:03:59.143 Always, Frames processed: . . . . . . . . . . . . . . . . . . . . 975
2021-01-12 14:03:59.143 Always, Total messages successfully received: . . . . . . . . . . 975
2021-01-12 14:03:59.143 Always, Total Messages successfully sent: . . . . . . . . . . . . 372
2021-01-12 14:03:59.143 Always, ACKs received from controller: . . . . . . . . . . . . . 372
2021-01-12 14:03:59.143 Always, *** Errors
2021-01-12 14:03:59.143 Always, Unsolicited messages received while waiting for ACK: . . 0
2021-01-12 14:03:59.143 Always, Reads aborted due to timeouts: . . . . . . . . . . . . . 0
2021-01-12 14:03:59.143 Always, Bad checksum errors: . . . . . . . . . . . . . . . . . . 0
2021-01-12 14:03:59.143 Always, CANs received from controller: . . . . . . . . . . . . . 0
2021-01-12 14:03:59.143 Always, NAKs received from controller: . . . . . . . . . . . . . 0
2021-01-12 14:03:59.143 Always, Out of frame data flow errors: . . . . . . . . . . . . . 0
2021-01-12 14:03:59.143 Always, Messages retransmitted: . . . . . . . . . . . . . . . . . 0
2021-01-12 14:03:59.143 Always, Messages dropped and not delivered: . . . . . . . . . . . 13
2021-01-12 14:03:59.143 Always, ***************************************************************************
2021-01-12 14:04:01.226 Info, Node002, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 9 items
2021-01-12 14:04:01.227 Info, Node003, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 8 items
2021-01-12 14:04:01.227 Info, Node005, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 7 items
2021-01-12 14:04:01.227 Info, Node007, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 6 items
2021-01-12 14:04:01.227 Info, Node008, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 5 items
2021-01-12 14:04:01.229 Info, Node020, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 4 items
2021-01-12 14:04:01.230 Info, Node029, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 3 items
2021-01-12 14:04:01.230 Info, Node030, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 2 items
2021-01-12 14:04:01.231 Info, Node031, DisablePoll for HomeID 0xe9973468, value(cc=0x25,in=0x00,id=0x01)--poll list has 1 items
2021-01-12 14:04:01.231 Info, Node032, DisablePoll for HomeID 0xe9973468, value(cc=0x26,in=0x00,id=0x01)--poll list has 0 items
2021-01-12 14:04:01.233 Info, mgr, Driver for controller /dev/ttyACM0 removed
2021-01-12 14:04:02.243 Error, mgr, Manager::GetDriver failed - Home ID 0xe9973468 is unknown
2021-01-12 14:04:02.244 Warning, Exception: Manager.cpp:373 - 100 - Invalid HomeId passed to GetDriver
2021-01-12 14:04:02.244 Info, mgr, GetSendQueueCount() failed - _homeId -375966616 not found