When I search on VMware Fusion and OSX Bluetooth issues, I find a TON of people that have had this exact problem for years and years, over many versions of both VMware Fusion and OSX. I've yet to see a solution.
In my previous incarnation of VM, with Windows 7, I had a similar problem - where my Bluetooth connected mouse and keyboard disconnect, but then reconnect after a short time. Now, with Windows 10, it's worse - it seems that the entire Bluetooth stack is completely dead until I reboot...
VMware, are you aware of this ongoing issue, and if so - is there hope?
Ok, I opened a case and VMware walked me through completely removing VMware Fusion (using AppCleaner for good measure) and then re-installing the Tech Preview, and it FIXED my issues!
Hope this helps someone else!
Thank you for the update and we hope you got all the assistance needed.