When searching for something, it takes a long time for it to load results involving the searched item. Is there a way to work around this or at least temporarily fix it?

Scratch's search engine is currently broken, and all we can do is wait for it to be fixed.
Unfortunately, no one seems to know what's causing this bug.
This bug affects everyone on Scratch, so the Scratch Team is aware of this situation.

Sometimes, search results will be returned after multiple minutes of waiting.