Cancelling to remove an undecided page as Anonymous actually removes the page

Steps to reproduce:

• Create a space and add some pages

• Activate Scroll Versions by adding a version

• Give anonymous permission to view, add and delete a page

• Open an existing page as Anonymous and remove it

• A user is forwarded to a separate page which asks if he really want to remove it

• Click 'cancel'

Expected result:
The page should still exist and user is forwarded to the page.

Actual result:
The page is moved to the trash despite the fact that the user clicked on 'cancel'.