Possibly a noise problem in the local network, hang on here for a few days and someone might be able to pick it up and give you some help or call 0345 454 1111 'now' and get fault reported
If I've helped let me know 🙂
10 year's managing 9 Virgin Media accounts, and things never got any better, closed last 4 accounts since January 2021 :L
I give 'my' experience to help where possible.