Intermittent outages with DOCSIS T3 timeouts and UCD errors

I’m having intermittent internet outages. Automated checks say the modem is online, but my NETGEAR CAX30 event log shows repeated DOCSIS errors:

- Critical: UCD invalid or channel unusable
- Critical: SYNC Timing Synchronization failure
- Critical: Started Unicast Maintenance Ranging - No Response received - T3 time-out
- Warning: MDD message timeout

Signal levels are borderline: upstream transmit power around 48.8-50.3 dBmV and some downstream channels down to about -8.3 dBmV.

Can an Xfinity employee please check the line/signal history, upstream noise, tap/drop, and schedule a technician if needed?