Over in the other thread (»
New Firmware- TM822G) , I identified your TM802 cable modem as BROKEN, because it's holding onto a stone-old software version (7.3.65) that CV upgraded to 7.3.123 over TWO YEARS ago - and a reboot on your part did not fix this. A modem that fails to upgrade has a high chance of being broken in multiple other ways - it can't be trusted to provide predictable or stable service - at all.
Thus: Why am I not surprised that you're reporting service problems of ANY kind?
Does this in any shape or form come, err: unexpected for anyone here?
Fix the things that you were told you have to fix first.
Self-diagnostics and self-medication, as evidenced in THIS thread, is counterproductive for you.