Not really much more that I need to say. It started after the update. It's a minor issue, but pretty annoying, especially trying to catch texts.
I thought the same thing at first. I proved myself wrong shortly thereafter. Press select, hold triangle, make chatbox maximum size, release triangle, now tap triangle to make the chat window return to normal size then tap triangle again and it automatically will go to the size you set it at. Hope this helps. -Mikey Niff