Spontaneous kit change after pattern clear bug?

I’m getting strange behavior from my MKI non-UW MD.

In real-time record mode, after clearing the pattern (func+play), immediately hitting the trig keys causes the kit associated with the pattern to change to the first kit in the kit list when the playback head loops back to the beginning. If I clear the pattern and then wait for the playback head to loop back and pass the first beat of the first bar before hitting the keys, then there is no problem. In other words, clearing the pattern and then hitting the keys within the same loop cycle causes the problem.

Anyone experienced anything like this? OS 1.62 and X.07