Lately I've been customizing my command manager a good bit & have noticed that these weird gaps between the buttons pop up from time to time. I've concluded that they are related to when you "start a group" on a button, & then remove said button. It seems like the invisible group break remains there & can't find any way to remove it.

See screenshot comparisons (below) of my two simulation tabs (one for part & the other for assembly).

Is this a known bug or is there a fix?