Removing instance variables using instance variable tab menu is broken
Version 7.6 introduces new functionality on the instance variable tab, next to the class and instance method tabs that control visibility of class and instance methods. The remove menu item is designed to allow you to remove an instance variable. This incorrectly modified the class definition so other instance variable names are merged.
Workaround
Do not use this function. Editing the class definition in the class pane will allow you to remove an instance variable. In later versions, these operations have been disabled.
Last updated: 2/25/22