The same thing is happening in QB Desktop Pro Plus 2023.  If you enter notes BEFORE you update any data fields for an item, the notes save.  If you update data fields first then add you notes and save, the notes are NOT there upon return and have to be re-entered.  It SHOULD NOT MATTER in what order data for an item is updated and saved.  Figuring this out has been a HUGE inefficient waste of time.  Intuit needs to fix this!!!