Created attachment 199534 [details]
Presentation for observing the bug

Reproduction instructions:

1. Open the attached presentation.
2. Select some slide (e.g. slide 7, with the rectangle).
3. Copy the slide.
4. Right-click between the two last slides (19 and 20)
5. Choose paste on the context menu
6. Undo with Ctrl+Z or Edit > Undo

Expected results:
The last several slides are visible in the slide pane, i.e. the scroll bar is around the bottom

Actual results:
The first few slides are visible in the slide pane, i.e. it's been scrolled back to the top.


Note that the contents of the slides doesn't matter, nor the exact number. This seems to happen with any presentation with enough slides for there to be any scrolling in the slide pane.