1. Do a search of 'Everything' that highlights a result in a Note document.
2. Click on the search result, the Note document opens up and opens up the note the result is in. Cursor is at the first character of the note.
3. Hit Ctrl-F, the inline search box comes up.
4. Start typing in the inline search box, slowly so you can see what happens. I was typing for example 'para' (without quotes), as the Greek word para was in my search result. I type p, and as soon as I type p the focus is lost, the cursor is gone, and the Note panel has closed to show a list of all the notes in that Note document.
5. If I then click in the inline search pane.and type 'para', it just resets the pane to some random looking (to me) note with nothing within that Note document expanded - not showing any result at all (it's actually AFTER the note that contains para in the list of notes within the document).
I can post a video if someone needs - it seems inline search is broken with a Notes document.