The TitlesMultiselectWidget does not search for Wikibase entities by label, alias, or descritpion like the entity search does. This means that the only way you can specify an entity is by id. For example, you have to search for Q17738 instead of Star Wars. Fixing this should not prevent adding content-based pages like User_talk:Apples.
|Open||None||T208749 👩👧👦 Update Extensions to properly handle Partial Blocks|
|Open||None||T214992 Wikibase support for Partial Blocks|
|Open||None||T207967 TitlesMultiselectWidget does not search Wikibase entities by label, alias, or description|