I know it isn't officially supported, but maybe someone has a fix, or support will do something.
For the official D&D 5e sheet, Roll20 restarts constantly, since around when d&d 2024 was added.
Tested on:
Different iPads.
Every browser I have tried with any settings.
Jumpgate or not is the same.
Other sheets work fine still. It just seems to be the roll20 sheet.
Happens even if you don't open a sheet (and use the app).