After updating to NVIDIA Game Ready Driver 461.09 or newer, some desktop apps may flicker or stutter when resizing the window on some PC configurations | NVIDIA this link does work, but keep in mind that after running the mpo_disable.reg file, a restart will be required. after restarting i no longer noticed the UI elements disappearing after clicking a menu button or any other UI.
Before I ran the registry fix, it seemed to happen after a few minutes of unreal being open, and i was forced to restart the editor to restore the UI to normal.
Seems to work!