In test.wikipedia.org Mediawiki 1.33.0-wmf.14 (a6319bc):
1: Partial block User:Apples from a page (e.g. Astronaut)
2: delete Astronaut
3: Now User:Apples cannot edit at all, anywhere!
User Jni-test789 sees error messages:
PHP fatal error: Argument 1 passed to Title::equals() must be an instance of Title, null given
Also the page name vanishes from block list:
Even worse, now I the blocking admin (in separate browser application) get the same error when trying to navigate to the deleted page:
Or when I try to edit the block, I recieve:
Restoring the page restores blocked users editing of other pages and my access to it.