Thanks. I also tried YouTube in browser with screen off and it worked fine with no outage. Also apple music works fine if the music is downloaded. So I think there must be something which has a problem with data continuing to be downloaded when the screen turns off. The phone continues to play what is buffered from streaming, but once it runs out of content it stops. Saying that, live radio continues to stream for a couple of minutes and as it's live, it does seem perhaps my theory is wrong, but it definitely only seems to be a problem with apps that stream data. I've tried multiple browsers and they all continue to stream content with screen off without a problem. This is definitely either and android or one.ui issue but I'm surprised if hardly anyone is affected. I'm going to try to raise with Samsung. I also have another brand of android phone which I will try on too to prove if it is one.ui/Samsung related