When mirroring sound but no pic

Hi!

When trying to mirror a game of football (soccer) purchased via the clubs offical app, I get sound on my Apple TV but picture stays on my phone. I been doing this for a while but only got this problem the last weeks. Everything else I tried to mirror works like a charm.

Asked the club and got this answer:

“”Nothing clear to explain this unfortunately. We run a Digital Rights Management service to protect our streams, and Apple use the same software to secure their content, so it may just be an Apple issue to secure the transfer of mobile content to a TV. We’re unable to support these kind of extended services I’m afraid. If it’s a recent change to an Apple product then best place to try is the Apple support forums/pages.””

Thanks in advance,

Peter