Scenario: a user has uploaded 20 images.
Nuke is run to delete the first 10 images.
Then Special:Nuke is called again. Now the first 10 images are still shown as "to be deleted" (but without thumbs). Deleting 20 images in this list results in error messages for the first 10 "cannot be deleted" (yes, we know, they have already been deleted).
Version: 1.18, species-id.net/openmedia/Special:Version
Not tested with pages, only with files.
EDIT: @mattflaschen does see it with pages.