I found no definitive supporting documentation that this is indeed a bug but given that the problem didn’t exist in Ventura but manifested in Sonoma, it’s not unreasonable to believe that Apple broke something.

See this [Mac Rumors forum pos][1]t we they were apparently tweaking things on the Manu Bar early on.  

The best thing to do is submit feedback to Apple:  https://www.apple.com/feedback/macos.html


  [1]: https://forums.macrumors.com/threads/sonoma-fixed-a-years-long-menu-bar-graphics-bug.2413768/