In Sprite Editor window Undo has wrong behaviour

1 Open attached project
2 Select Sprite_Sheet_One.png in the project view
3 Open Sprite Editor window - in menu Window->Sprite Editor
4 Choose Sprite_Sheet_One.png
5 see image1
6 Change Minimum size and press Ctrl Z few times - see result image2
(Any change in the Slice Window of the Sprite Editor cannot be undone with Ctrl Z)

Actual result: the sprite selection was undo
Expected result: the Minimum size value should be undo in slice window