I just upgraded to iOS 16.2 but it was doing it before the recent upgrade too.
Steps: *all with the keyboard visible - notes are lost
- Click Start on an assignment
- Tap Notes to add a note, the keyboard appears. Enter some notes.
- With the keyboard visible, change the assignment to Pause
- Click Resume - then click the pencil to edit notes (this is where the notes disappear)
Steps: *now lowering the keyboard- notes are saved
- Click Start on an assignment
- Tap Notes to add a note, the keyboard appears. Enter some notes.
- Lower keyboard, change the assignment to Pause
- Click Resume - then click the pencil to edit notes (the original notes are there and don't disappear)