EDIT: So the bug is not fixed, gesture navigation is still broken, but I've found a workaround: turn on double tap to edit in the settings.
In short: when editing a note, the back gesture does not work as intended, while 3 button navigation still works perfectly. I have attached a video highlighting the issue.
Reproduce like this:
1. open a note and press on edit
2. press anywhere on the note and the keyboard will open
3. perform a back gesture anywhere, keyboard will close
4. perform a second back gesture anywhere, edit mode will exit briefly, then a press will be registered and you are back in edit mode and the keyboard will open
In order to actually exit edit mode at least 3 consecutive back gestures have to be performed in very fast succession.
The phone is a Galaxy S24+. It might be a bug in their gesture navigation implementation but I don't think so since all other apps work fine.
Screen_Recording_20240317_140625_One_UI_Home[1].mp4