Using shapekeys, you get corruptions in other shapes when you undo into a previous editmode session. The "key index" values become invalid. Now, if you have shape keys, entering editmode will clear the previously stored undos.
Using shapekeys, you get corruptions in other shapes when you undo into a previous editmode session. The "key index" values become invalid. Now, if you have shape keys, entering editmode will clear the previously stored undos.