Intermittent T3 Timeouts / RCS Partial Service – Upstream Noise? (Hub 3)

I’m having ongoing connection issues with my Hub 3. The modem logs are filling up with the following:

11/09 – 15/09: No Ranging Response received – T3 time-out (critical)
11/09 – 14/09: RCS Partial Service (warning)
14/09 + 11/09: DHCP Renew warning – field invalid in response

These errors have been appearing regularly between 9th–14th September, and I still see them popping up now.

Current signal levels:
Downstream power between +7 and +9 dBmV, SNR about 40 dB, no uncorrectable errors.
Upstream power between 38 and 39.8 dBmV across 5 bonded channels, 64QAM.

Timeout counters are currently zero but the logs show multiple T3s.

Speed test when the connection is stable: about 527 Mbps down, 52 Mbps up, latency 14 ms, jitter 1–2 ms, packet loss 0%. 

Symptoms: intermittent drops or slowdowns that line up with the T3 errors. Cables are finger-tight and I’ve tried bypassing splitters.

Question: Does this look like an upstream noise or return path issue on the VM side, or is there anything else I should try at home first?

Thanks in advance.