Here is my windows test on a 3090 rendering 100 frames of animation of the astronaut file, with 32bit EXRs on and 6 AOVs. Everything rendered fine.
I would certainly look at other hardware factories, like disabling the second card, updating drivers, trying windows, trying a new machine etc. I have also have several other machines tested. And no memory leaks. And more importantly no errors at all in the console. Not even warnings.