Hello

When I use the start10 search bar, at the bottom of the start10 menu, it will seemingly randomly stop showing all search result.
It will start showing only a subset of results. Rebooting the computer solves the problem, for a while; but then after a few minutes or hours the problem will come back.

Here's an example:
If I type the letter "c" in the Start10 search bar, then:
When it works properly:   It shows about 30 results, including CCleaner, Google Chrome & Camera Roll. 
When it stops working properly:   It only shows 14 hits and DOESN'T include Cleaner, Google Chrome & Camera Roll.

Here are screen shots of the above search results.

On the left, is the correct behavior                           On the right is the wrong behavior

Another example is a search for the word "Features"

On the left, is the correct behavior                           On the right is the wrong behavior

VERY IMPORTANT CLUES.
1. Rebooting the computer fixes the issue, for a while
2. Using Windows10 search, directly, works correctly

Whatever solution you suggest, it must take the above clues in to account.
You might be tempted to suggest an indexing issue, or changing a windows10 search setting. But the above clues rule these things out.
Also, ENABLING the Start10 setting "Search should include files outside the standard libraries" makes no difference.

I have a brand new computer (5 days old and fully patched) with windows 10 build 2004 (20H1)
I experienced the problem with Start10 versions 1.75 and 1.94 (I didn't try any other versions)
I'm an experienced computer professional