Weird Group Assignment Issue With Platinum

I was working on a song today using my MCU for transport control. After hitting stop, then play, I suddenly had no audio and the master fader jumped to -infinity. I found that the output faders (the ones in the 3rd mixer section that control the level to the audio interface) had somehow automagically gotten assigned to a fader group. After removing them from the fader group, things seemed to work fine, but it was a weird glitch. I never assign the audio interface faders to anything and keep them hidden. I think this is a new issue, it never happened with X3. I had something similar happen a couple days ago but the faders didn't get assigned to a group so double clicking them fixed the problem. Has anyone else seen anything like this?