While I like my ASRock B550M-ITX/ac, the Intel 3168 WIFI+BT is garbage. I knew the wifi was slow and the range sucked even with the antennas. I don't use it so no problem. But the BT being flaky as hell grinds my gears because I use multiple BT devices.
It does not require a windows update for it to suddenly throw a failed to start error in device mangler. It will work for a few boots then fail again. Different driver versions, removing it and the drivers, including scouring the registry, do not help. Nor does disabling enabling or anything else like not letting windows turn it off to save power.
Want to know the fix? I leave it as is with the failed to start error and turn the PC off. Plug in a generic USB BT radio. Boot to desktop. Use the generic until it stops working.
And it will stop working. When I check the mangler, the Intel is now fully functional and the USB BT has the error.

I hardly use it now because it is the slowest of my 3. I'll swap in a better M.2 when I get around to it.