Frequent T3 timeouts and internet dropping

I have been getting this issue on and off for the past 6 months. The modem is reporting lots of T3 timeouts causing the internet to drop for a few minutes. This seems to be happening at random times, and is getting more frequent

I have the Hub5 setup in modem mode. This is the second one as VM replaced the first as a precaution. I have setup a ping sensor in homeassistant to help be log when these occur:

27 March 2024
    7:00:59 am
    7:58:58 am
    13:17:03 am
26 March 2024
   11:16:09 am
22 March 2024
    2:17:24 am
19 March 2024
    10:21:47 pm
    1:07:33 pm

I have had an engineer out who tested everything and couldn't find the issue. Replaced the modem and filter, but i am still getting the issues. I have been in touch with VM support via watsapp which seem to be clueless and refuse to send out an engineer. Twice now i have been told that they will monitor, but not hear back from them

The worst response i got was today:

Thank you so much for sharing all the information. The hubs that are offered to our customers are the regular one's which are suitable for residential usage purpose only, these lags or issue with the internet connection are possible sometimes and we suggest our customers to reboot or reset the hub the hub at those times.

They seem to imply this is fine for residential and tried to sell me on a support package. I have rebooted and reset the hub multiple times, which sort of solves the issue, but not for long. Mostly it happens in the middle of the night, but has become more frequent and now during the day, which isnt ideal as both me and the wife work from home

All I want is a stable internet connection, is that so hard to ask for? I am in Saltash, Area Ref :18

27-03-2024 13:20:31	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:20:31	critical	16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:20:07	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:19:57	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:19:57	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:19:57	critical	16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:19:46	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:19:46	critical	16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:18:59	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:18:58	critical	Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:18:58	critical	16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
27-03-2024 13:18:55	critical	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;

The modems Status:

Cable Modem StatusItem Status TypeChannel Overview Downstream Upstream