SilkTone
And once again, this is the bug you most likely ran into, and is a leftover bug from when Noel mostly fixed the MIDI crosstalk bug and the crash when using more than one VST sending MIDI out.
Hi, Silktone. I'm not so sure that issue is applicable here. The problem there is that a track
receives/records input from a virtual MIDI Out that is not selected as Input.
In this case, a track is reportedly
echoing MIDI to its Output when it shouldn't be. There was no indication of a problem with the input assignment. Even if it was somehow receiving MIDI from Kontakt (which the OP indicated did
not have MIDI Out enabled in the synth rack), it shouldn't have been echoed to AD if Input Echo was not enabled.
In summary, this was an Output problem not an Input problem. It's possible the OP encountered some
other bug I haven't seen, but I don't see how it could be the bug you've referenced, though I've confirmed that bug persists in Platinum.