Since the latest patch, some NPCs will skip the whole dialogue with a single press of a button.
Usually when you press A it will autocomplete the text dialogue, and it will only skip by hitting A again after. Now, some NPCs will just skip the whole dialogue instead of showing the whole text.
This happens very randomly so you might be pressing A to read through the dialogue, and suddenly it might skip it totally.
I have missed so many dialogues because of this.
Video of said bug. I have press only ONCE. It is not my controller problem as I have tested it on other games and programs.