Definitely wrong on the Mac part. This gremlin has been chasing me through 3 or 4 different setups (different interfaces, PCs, OS versions) in the last ten years. All of them Windows.
Several years ago, a guy took matters in is own hands and spent weeks trying to reproduce it, finally succeeded and the bug was logged in.
At this point, whoever needs to know about it, knows about it. The subject rises on the forums from time to time.
It is my guess that this bug happens waaaaay more than people realize, it just goes unnoticed because sometimes it affects really subtle volume automations and things like that.
This (and just a couple minor things) is why I don't use SO for any professional work in spite of it being my favorite DAW by far.
Sorry for the negativity, this matter is kind of triggering for me.

When you get to this point, I don't think the "burden of proof" should be on the user anymore.