If this was an issue across the board, there would be hundreds of posts about it. I remember it happening in one release that was soon fixed(old enough that I can't remember a number/version). In any case, Things seem fine here
Things that might matter:
1-trashing prefs is always worth trying for any weird behavior.
2-if you can pin it down to certain plugins, maybe it/they need an update(especially if its all from the same company such as Waves, McDSP, etc).
3-if you can pin it down to certain sessions, maybe there is some sort of corruption(which can be tough to solve, but start by creating a blank session and importing tracks, a few at a time, to test).
4-when asking about problems, always include your exact OS and exact version of Pro Tools.
5-if you can, try the next newer, or next older version of Pro Tools.
6-if the problem started after an OS update, roll that back to test(and always have a backup plan for any and all updates)