Steps to replicate the issue (include links if applicable):
- Enable live preview
- Open the editing page of the same nonexistent page in two tabs
- In one tab, enter something and save the page
- In the other tab, click "Show changes"
What happens?:
The "Latest revision" pane is empty, as if the page doesn't exist.
What should have happened instead?:
The diff is actually between the current content of the page and the text in the textbox.
Other information:
AFAICR it used to work as expected. I believe this is a regression.