[BUG] Sometimes results only show open apps, and no search results

[A-Walrus]

Noticed recently since updating, never happened before.

For example I would expect the settings app to appear in this search:

Not sure how to reproduce this sadly :( It seems to come and go (happens a few times in a row consistently, then stops happening then comes back again)

[Gr3q]

Probably same as this one pop-os/cosmic-epoch#1016

[nick42d]

Still present on alpha-4 - when in this stuck state pressing enter on any of the open apps does nothing either (expect it to select the app)