Unfortunately, I have the same issue CaseySJ. I removed the intel CNVi module on day one of my build, but I do have Windows on its own drive but I never use it...maybe once every other month or so. The Bluetooth in the Fenvi simply shuts down and the machine appears to be locked up. I can remote into the machine sometimes and shut it down but other times it does actually lock up. A hard shutdown is the only thing that fixes it and then when the machine restarts, it works fine for days. Very strange. This is probably the only thing that really goes wrong with my entire build.
I'm wondering if it may be related to another issue by another user relating to USB. I have several USB fixes that might be conflicting...USBinjectAll.kext, USBWakeFixup.kext, and SSDT-USBW.aml installed. Could they be conflicting?