7.5.40 Weirdness #2: Brief lockup, some Windows whited out

Recently updated to 7.5.40, and some things have caught my attention. None of them are consistent, meaning I can try to reproduce the problem several times, and it might show up only a few of those.

This one happens a few times every hour or two. There will be a brief pause in playback, some of the open windows (like maybe the History, or Control Room Windows) turn empty with a white background … and then in a few moments, all returns to normal. This can happen when playback is not taking place as well. There has never been a complete crash with this.

Anyone else see this … any suggestions?

Thanks -