Can't use Apple wireless keyboard with both systems

Although it's been a few years when I had Windows running on my real Mac via Boot Camp... I can't recall it's ever been that way, so it might be somehow Hackintosh related.

I have an Apple wireless keyboard (2nd gen), a perfectly running Hackintosh and an old BT 2.0 dongle by Speedlink (until my M2 arrives). I know BT 2.0 is old, but the keyboard doesn't require anything newer.

When I started using the keyboard for the first time, I could Success fully pair and use it with macOS. Later on I rebooted into Windows and could do the same with ease. Pairing went fine and I could use it in an instant.

But the problem occurred when I rebooted back into macOS again: the keyboard didn't work. Only way to make it work again was to remove the device from the BT panel and pair it again. Annoying, but I didn't think too much about it.

Then I rebooted back into Windows and the keyboard wasn't paired AGAIN.

The whole thing keeps repeating that way. It's like the keyboard can only be paired to one system at a time. Each time rebooting into the other system means re-pairing over and over again.

I'm not using any custom kexts for my BT since the dongle worked OOTB.

Any idea why the keyboard keeps behaving like that? I don't have that issue with my mouse.

Latest Windows 10, latest High Sierra 10.13.6 (security patch 2018-002 included)

MSI Z370m Mortar

16 GB DDR4 Ram

8700k

1080 TI

Author: @tentacle-guy