Not much help but I found the combination of Virtual Box and Windows 10 on MacOS incredibly flakey - particularly with regard to USB - I could sometimes stop/start/occasionally reboot and get it all working but often not…
I ended up buying parallels for Mac which doesn’t help you but does work just fine. I also notice that the performance of W10 inside parallels is way better than it was in virtualbox - part of what I suspect the issue was