Seems like this old bug returns. When I use my bluetooth Logitech K480 keyboard, the screen freezes for 10 seconds and then a CTD. This was also present shortly after release, but then they fixed it in an update (screen freezing still existed, but afterwards it continued without problems).
Can you please file a zen desk ticket if you have not done so already? I am affected as well and would dearly love to use my wireless mini BT keyboard in my homepit.