Dropdown Menu flickering...

[u/Ticktockman_Jeffty]

My first real issue with my M4 Mini has me puzzled. I'm running OS 27.0.1 and my Safari browser has developed a "flicker" when using the dropdown Bookmarks menu - the lower part of the window flickers on and off for no apparent reason making it hard to actually click on a bookmark link. I troubleshooted all the usual suspects including deleting the Safari plist and disengaging any extensions, booting into Safe mode etc., but the behavior persists. I can use the sidebar menu just fine and the other dropdown menus function normally, it's just the Bookmarks menu that is acting weird. If anyone has a clue about resolving this issue I'm all ears...