Card stacked on each other

KaffeeO

I played a drifloon earlier in the bench. In one of the rounds when picking one pokemon to go to the Active, i moved it, but somehow the game moved my rad greninja as well, and they stacked on each other. After that I could not use my drifloon for anything, even after the rad greninja died. What happened after was my gardevoir stacked on it, and the drifloon just vanished from the game logs and I couldnt find it in my deck or pile or anywhere.