I've tried passing through the motherboard bluetooth to my Windows 10 VM. The bluetooth drivers are installed and I can connect to bluetooth audio devices, which seem to work flawlessly. When I try to connect my bluetooth keyboard (CoolerMaster SK621), it can connect, and I can start typing right away, but if I stop typing for more than 3 seconds, it seems almost as if the keyboard or on-board bluetooth hangs. I've troubleshooted this with purchasing a USB BT dongle, the popular LogiLink BT0015,