Hearthstone before the patch used to black screen during matches on mobile phone. It was not that often but it was annoying. However, now I am getting it nearly every match. I use a Google Pixel 6 Pro which works perfectly.
Edit: It is even doing it during Battlegrounds.
Happening all.day for me as well. I’ve tried clearing cache but no help…
This forum is for issues with the Mobile Authenticator application. That is not related to issues with Hearthstone.
The place to check is the Hearthstone Technical Support Forum.
I see a thread there about crashing on Pixel phones that has Blizzard (blue) info in it.
You will want to follow that thread for more info.