When dragging a trigger to move it, it assumes the visual presentation of the adjacent trigger. If you scroll it out of view and back again, it goes back to normal.
It only happens if you drag it beyond the current view (i.e. the section you are scrolled to). If you stay within the view while dragging, or if you drag it out of view and then back into the same view, it keeps its correct presentation.
It is not affecting any function, it still works as normal the whole time, so it's purely visual.
MacOS: 15.6
BTT: 5.570
See video: