Have you tried any of the following?
Delete the youtube app and re-download it.
Reset network setting.
Turn the phone on and off.
Thought I’d update you, since uninstalling and reinstalling the app I’ve had no issues. Should have thought of trying it myself. Thanks for reminding me to try it haha.
Seems the batter life may have slightly improved now too. But I’m keeping an eye on it, I’ve turned off a lot of background apps refreshing.
