Issue with UIBuilder viewer

Just using the default Toolbar and Toolbar Buttons, the layout for the elements get screwed up after saving or undoing

It looks fine in an actual window, but there isn’t anything that i can do to fix the layout in the Builder View once it’s messed up

Builder:

EditorWindow:

Hmm, I cannot repro this issue. What version of Unity? And also, do you still see the issue if you close/re-open the Builder window?