Can't connect iReal to Apple TV

Hi Everyone.
I updated my iPhone to 11.4 and now can't stream iReal via my Apple TV to my home stereo system. My iPad is still using 11.3 and streams fine. This is only affecting iReal. Everything else on my phone streams fine.
Anyone else noticed this same problem?

Thanks! yes we have been looking into this...

We will be releasing a minor update v8.2.4 very soon. It includes support for Airplay 2 (now in Apple TV).