Comment # 1 on bug 1221504 from Takashi Iwai

(In reply to Andreas from comment #0)
> Looks like this is the error
> https://bugzilla.kernel.org/show_bug.cgi?id=217651
> 
> Here's a fix
> https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/
> commit/?id=f0408f0a1998df76b64e76a05fd7ca00f266e654

The actual fix is the commit 95b7015433053cd5f648ad2a7b8f43b2c99c949a
    Bluetooth: btusb: Fix bluetooth on Intel Macbook 2014
and this has been already backported to Leap 15.6 kernel.

Just to be sure, could you check the kernel in OBS Kernel:SLE15-SP6 repo?
  http://download.opensuse.org/repositories/Kernel:/SLE15-SP6/pool/

If the problem persists with it, it implies that your problem is different.