I strictly play classic as of a month or so ago, which is when I began noticing this.
You’re not helping by throwing random assumption at what we may or may not have done. I can definitely tell you that between the time I played retail and then swapped to classic, I didn’t “run” any new software, or “make changes” to windows settings, or registry.
You do not know if its widespread or not, prior to me commenting and the poster above me, it was only this op getting the issue as far as everyone was concerned.
Now we have two more in this thread saying it.
Literally heres another thread from 2 days ago that has another person hitting it lol