It uses wb_terms table for search. It shouldn't
|Resolved||PRODUCTION ERROR||Addshore||T195520 Multiple projects reporting Cannot access the database: No working replica DB server|
|Open||None||T96040 Wikibase special pages (tracking)|
|Open||None||T195754 Re-enable Special:ItemDisambiguation|
|Stalled||None||T195755 Migrate Special:ItemDisambiguation to use elastic|
|Resolved||Ladsgroup||T195756 Disable Special:ItemDisambiguation|
Is there any way an error message could be shown to users to explain why Special:ItemDisambiguation is being redirected to Special:BlankPage? It's quite puzzling for someone who isn't aware of the current issues.
I understand that it may not be a priority to do this now, but if redirecting to Special:BlankPage is something that could conceivably be needed again in the future, it would help to have some sort of mechanism to also provide an informative message when that happens, so that the next time the behavior isn't so confusing.