Yeah so we’re seeing a lot of these reports. Some team members are able to reproduce this but others can’t. Looks like its Google/Youtube doing some A/B testing on the account side, which is why background play works for affected users if they’re not signed in but stops if they sign in.
Team is taking a look at this presently to see what we can do about this. Will update everyone when we have more information on this.
Thank you to everyone for reporting/testing.