Create a notes document and add a bunch of notes to it
In that notes panel, type Ctrl+F to bring up the Find box
Type something into the Find box that you know is somewhere within one of the notes you created
Press Enter
Result: Nothing happens. The focus doesn't even move away from the Find box.
Expect: Search within the notes.
Without this functionality working, using the main Search panel to find something within your notes (under My Content) is limited, because if your notes are lengthy or you have a lot of them, you won't easily be able to find the specific place within that notes document where the text was found, because clicking on the hit in the Search results under My Content only brings you to the top of the notes document.