I experienced this yesterday with SU10 beta 1.27,20.0 on Xbox.
I was making some control mapping changes and the cursor became so jumpy due to poor FPS it was extremely difficult to place it directly over the various entry fields.
I’ve not seen this before other than in the Logbook, where it consistently has poor FPS. The logbook issues has existed before the beta, however.
Does your issue come and go, or is it a constant? Does it happen everywhere in the menus or in specific areas?