Interesting... If you haven't already filed a ticket with Stardock, I would, as that's not normal.
Just so you 're aware, it could also have nothing to do with Start10, so I'd recommend verifying your index by 1. checking if all indexing has completed or if it's still indexing, and 2. if indexing has finished and there's still a lag with results populating, I'd recommend re-indexing windows.
- Re-indexing will take several hours to several days depending on how large your file system is and how large files that are indexed are. This includes Outlook pst and ost files, which take a significant amount of time to index.
Before indexing, if using a laptop, I would recommend shutting down the laptop, removing the power cord and battery, and holding down the power button for 30 seconds. Once completed, boot the laptop back up and see if the lag is still there, and if so, try re-indexing.