One of the SBS questions from ONE PIECE's tankobons has someone mentioning to Oda that whoever is talking in the panels always has their mouth open- i.e., you'll never see someone next to a speech bubble with their mouth in a straight line. I then flipped through a random copy of JUMP and noticed that there are surprisingly several series that have their characters talk even though their lips aren't moving.
At first I never noticed this detail, but now it has become pretty distracting.
Has anyone noticed this or other similar patterns in manga?