This is a long standing issue with NVDA.

1. Open the Windows 10 Start menu.
2. Type in the name of an app/program like' Notepad'. If you type 'Note' for example, that should be sufficient, and I recommend that because the issue would become easier to spot.
3. Press Enter. The menu will close and something happens before Notepad starts.

Expected: NVDA just keeps quiet and Notepad starts.
Actual: NVDA says Note, Notepad etc. (whatever you typed) then starts the program as expected.

I have noticed this with:
NVDA as far back as 2015.3 to the latest Next snapshot.
Windows 10 as far back as 15240 to 15063.413 and still going.
Speak typed characters and words both on and off. It doesn't matter.