Same problem here. Also have done the cache clear, reinstall process. This morning, I did get a login prompt for the game for the first time, and while that worked, the game itself was still blacked out.
I've also tried changing settings and permissions in Game Booster to no avail.
I can confirm as well that I hear sound effects if I randomly tap the screen, so I agree it's likely a rendering issue.
I've noticed that a couple of other games, that when I answer a text message or other the screen will go black on them too. But when I restart my phone they go back to working again.
I haven't even gotten the security update yet! I saw couple days ago that people are getting it, but this brand new phone is still on Dec security update. I have a really old Samsung that has the January security update. And still nothing on the Microsoft solitaire and mahjong. I'm a subscriber to Mahjong so it's really frustrating that I'm paying for it but can't get it on this Galaxy s25.
