Cannot edit fallback pages on Confluence 8.9

Steps to reproduce

1. Create a space with 2 versions "1” and “2”

2. Add a new page in version “1”

3. Switch to version "2” on the new page

4. Click edit

Expected behavior

The editor opens and the page can be edited

Actual behavor

An error “Your request could not be processed because a required security token was not present in the request” is displayed