Make shure that you have all needed kexts installed:
BT4LEContinuityFixup.kext goes to EFI/Cloverkexts/Other
BrcmBluetoothinjector.kext, BrcmFirmwareData.kext, BrcmPatchRAM3.kext go to L/E
Doent forget to make shure that IOBluetoothFamily.kext is installed in L/E.