The part should get removed but the UI Visibility status should remain. (Usually changes made in the View tab are not added to Undo history at all, so it is odd in the first place that pressing Undo can even affect this value.)
Actual Behavior
UI visibility reverts to its previous state and the created part is deleted.
Issue Area: Studio Issue Type: Display Impact: Moderate Frequency: Constantly First Experienced: When the original UI visibility toggle was removed
Another bit of info for this bug - the UI Visibility toggle does not change state when the visibility setting is undone. This also occurs when you use Redo to restore UI Visibility. Basically, it’s possible for the UI Visibility button to not accurately reflect the actual status of the setting.