I have found this to be problem as well. Deleting the developer app seems to work for me. I don't have to disable developer mode. But Airplay is still flaky. I have not disabled developer mode to see if that helps, as the problems are intermittent and not sure I'd be able to narrow it down. But deleting the developer app definitely helps.
I've confirmed the issue is indeed resolved and will be pushed to production with a future update to AirPlay. We're working with Apple to align on a date. I can't offer a specific timeline for that update to be published to production at this time.