CM3000 Repeated Cox disconnects with SYNC Timing Synchronization failure

I am providing the results of my further investigation. This assessment comes from a ChatGPT analysis of the CM3000 diagnostic information and event logs:

Observed Technical Symptoms:

1. Modem Diagnostic Status:
   - Startup Procedure: Successfully completes downstream acquisition, DHCP, and provisioning.
   - Cable Diagnostic: Status = Poor | Mode = Partial Service

2. Upstream Bonding (SC-QAM & OFDMA):
   - Channels 1–4 (ATDMA) locked at:
     - Frequencies: 17.6–36.8 MHz
     - Power: 34.0 to 35.0 dBmV
   - Channel 5 and OFDMA Upstream Channel 1 (Channel ID 6 @ 36.8 MHz):
     - Not Locked
     - Power reported = 0 dBmV
     - Modulation/Profile = 11,13
     - Power when it appears = 31.0 dBmV

3. Downstream:
   - All 32 SC-QAM channels locked with SNR from 43.7 to 46.3 dB, power +5.8 to +8.0 dBmV
   - Two OFDM downstream channels locked, minimal correctables, zero uncorrectables

4. DOCSIS Event Log (during each drop):
   - SYNC Timing Synchronization failure – Failed to acquire QAM/QPSK symbol timing
   - RNG-RSP CCAP Commanded Power Exceeds Value
   - Dynamic Range Window violation
   - DHCP Warning – Non-critical field invalid in response
   - Unrecognized OID
   - US profile assignment change

Technical Assessment:

• The modem consistently fails to lock Channel 5 or the OFDMA upstream path (~36.8 MHz), which appears to be required under certain provisioning states or load.
  - OFDMA Channel ID 6 remains in a Not Locked state, often with low reported power (31.0 dBmV), likely below CMTS thresholds or too noisy to maintain sync.
  - The SYNC Timing and RNG-RSP events suggest return path SNR or ingress noise impairments, likely within the 24–40 MHz range, or an upstream profile mismatch with the CMTS.

Advice would be appreciated.