I had creatures I bought just disappear and get replaced by something else. It's like it thinks I'm playing two different Arena matches and one of them all I have is one creature but it keeps swapping to that game until I refresh.

Members of my team have been removed from my team into the reserves.

I've had creatures not merge despite having enough to merge (specifically the Crystalapin wouldn't merge to three star yesterday though I didn't think to screenshot)

I've had it remove creatures I bought. Suddenly things I sold because I didn't need them reappeared in my reserves.

I go to refresh the shop and it won't refresh or it seems to be pulling a refresh from the other game it thinks I'm playing and I need to refresh the page to make it revert back to the game I'm actually playing and hope that it works.

Edit: I tried another game to see if it was one off but the exact same thing is happening. Though this time it did also lower the rank of a bunch of my guys by 1 randomly mid game. It still thinks I am playing two separate arena games at the same time. The shop randomly switches between the games.