1) Yes, 760p suffering from the bug.
2) I have installed windows 10 directly on the NVME and it works perfectly. Unfortunately the only way to make it work with windows is to patch kernel since XML solution does not really work or buy another drive.
This workaround works fine with linux guests but I was not be able to make it work with windows.
I had to patch kernel to make it work with windows.
Unfortunately last workaround currently implemented in unraid did not work for me either.
You could try to use older patched unraid kernel.