Upstream Channels not locking

Hi, I need help with a clear upstream signal issue on my XB8. My modem cannot lock the required upstream channels. Upstream channels 1, 2, and 3 all show “Not Locked,” and my DOCSIS 3.1 OFDMA upstream channel (41) is locked but has a symbol rate of 0, which indicates the CMTS has disabled it due to noise. My upstream transmit power stays around 29–31 dBmV, confirming a return-path RF impairment. Downstream channels are normal. This is causing constant packet loss, lag spikes, Discord voice dropouts, and general upload instability. This is not a WiFi or equipment problem. It is a return-path issue at the tap, drop line, or node, and requires a line technician or maintenance tech. Please escalate.

This problem has been persisting the past week and has made the internet pretty unusable at times which is critical for me since I work from home and shouldn't have to deal with this. Sometimes there are no upstream channels at all.