I can also confirm the same issue on CM8200 (SB8200 clone) resulting in disconnects every day or so requiring reboots to fix. The upstream/downstream signals are all perfectly fine even during the disconnection period. There are no uncorrectable errors either. This has been driving me nuts for the past 2 weeks.
Also like several others running firmware: AB01.01.009.51_080720_183.0A.NSH
12/17/2020 11:04 84000500 3 "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=58:19:f8:b5:ae:65;CMTS-MAC=00:cc:fc:60:0d:d1;CM-QOS=1.1;CM-VER=3.1;"
12/17/2020 10:52 67061600 6 "DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=58:19:f8:b5:ae:65;CMTS-MAC=00:cc:fc:60:0d:d1;CM-QOS=1.1;CM-VER=3.1;"
12/17/2020 10:52 73040100 6 "TLV-11 - unrecognized OID;CM-MAC=58:19:f8:b5:ae:65;CMTS-MAC=00:cc:fc:60:0d:d1;CM-QOS=1.1;CM-VER=3.1;"
Also encountered many "dynamic range violation" errors resulting in disconnections.
