Intermittent Connection Drops with T3 and T4 Timeouts

Good Evening. I wanted to post this to the forums in the hope to get a more experienced opinion. I moved to a new apartment during the pandemic and have since been getting really bad internet service. During the first few months, it was tolerable but now I get connection drops multiple times during the day and in most cases, I have to restart the modem/router. It is at a point where I simply am not able to work from home.

I have received the following responses from Xfinity support which haven't been any help,

• On the first occasion, customer service mentioned that there was maintenance in our area and that service disruption was temporary.
• On the second occasion, customer service said they had to resend a signal to the modem. They were confident that this was the issue and said there was no need for escalation.
• On the third occasion, I had to work really hard to get a technician onsite. The technician put a new splitter as an optimization but he said the main issue was with my Netgear Router. Although slightly disappointed, I was actually happy as it seemed like logical troubleshooting as opposed to just being asked to power cycle my devices like with customer service on phone. 

I swapped out my Netgear Router plus Motorola Modem for an Arris SurfBoard SBG6580 Modem+Router combo. Unsurprisingly, the problem still persists. I am posting this with some logs hoping someone can point me in the right direction. I do see a lot of Critical errors with T3 and T4 timeouts and from a little research online it seems something is definitely wrong here.

Thu Apr 08 12:26:08 2021 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 12:26:08 2021 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 12:26:07 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 10:29:53 2021 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 10:29:53 2021 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 10:29:53 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 10:11:06 2021 Notice (6) TLV-11 - unrecognized OID;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Time Not Established Critical (3) No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Notice (6) T4 No Station Maint Timeout - Reinitialize MAC...
Time Not Established Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Notice (6) Honoring MDD; IP provisioning mode = IPv6
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Notice (6) WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INIT
Thu Apr 08 10:07:50 2021 Critical (3) Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 10:03:30 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 07:30:22 2021 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 07:30:22 2021 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 07:30:21 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 07:30:21 2021 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 07:30:21 2021 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;
Thu Apr 08 07:30:20 2021 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=78:96:84:be:37:37;CMTS-MAC=00:01:5c:af:82:52;CM-QOS=1.1;CM-VER=3.0;

Modem/Router Combo Model: ARRIS SURFboard SBG6580
https://www.amazon.com/ARRIS-SURFboard-SBG6580-DOCSIS-2-4Ghz/dp/B0040IUI46