I am getting this on Xcode 13 release version. Is there anyone else?

Same issue here as well. Seems like a abandoned Xcode feature.

I have been struggling with this for months, its been like this on betas as well. I feel that there has been filed enough feedback that this could be prioritized.

I have experienced something very similar to what you described. we are using NSMetadataQuery which doesnt return results -sometimes. Sometimes it doesn’t post updates. Sometimes it works fine. Please can you let me know if you found resolution?