No ideas related to the drive itself. I can say that if you use grouping on both the solo and mute buttons at the same time on a track and toggle back and forth, sometimes it seems to get into an invalid state. Then, clicking the Mute and Solo buttons don't always work.
So, I guess I'm saying that something with the grouping I have seen go corruptish, but I don't have anything repeatable right now.
It's been a while since I've seen it.