That box does multiboot so while you are waiting why not try another slot and setup from scratch, ie a new install, ignore all restore options but this time use Vix 6.8.001, reason I say that is I have it in a box since November 2025 and its perfect. I dont see a need to update. You have to configure everything carefully, and dont can until you have abm sorted and epg to hdd and network tested.
Then if still iffy use openatv 7.6 etc, and then ....... = iffy piece of kit = plenty of proof.
To add make sure all connections are sound.