I created a new Win10 VM, first one on RC6, passing through a Logitech receiver/mouse and a Corsair keyboard (1b1c:1b20) and video card. Standard procedure, same process I've done three times on RC5 when setting up a new VM.
After starting the VM, the keyboard becomes unresponsive on the unraid console, as expected as it's being passed through to the VM. Roughly 25 seconds later, the keyboard becomes responsive again on the console and not responding in the VM.
I expect this issue to go away on RC7 with the rollback but logging for posterity.