OK, that’s indeed weird and the “unspecified lunch failure” often points to an issue in the lower stack.
I assume all devices are 2080Tis? Could you update PyTorch to the latest version and check, if it would still be failing? I guess you’ve built PyTorch from source?
Would it also be possible to post a minimal code snippet to reproduce the issue (the gather operation might be sufficient)? If so, I would try to reproduce your setup and see if I could also hit the issue.