NBA App Major Casting Issues (iOS)

Alright this app has been giving me major issues for a while now and I'm wondering if anyone else is having the same issue. Its the official NBA app and I use it to watch league pass games.

The casting quality from my iPhone is amazing...when it works. After a random amount of time casting, a message pops up on my phone saying "video is not available on chromecast". I've tried restarting the app, restarting my phone, even reinstalling the entire app, and nothing works.

It's nothing to do about blackouts since I can watch the game from my phone just fine. Is the app just shit? The quality and everything is prefect but this stupid error message is really annoying. Would appreciate ANY help!