Chat bar scroll distance saved when moving to another message

When you enter a chat message that is longer than the length of the chat bar, the view will scroll to the right so you can see the end of the message. However, when you use the up and down arrow keys to move to other messages, the distance that you scrolled over is saved. That means that shorter messages will be cut off on the left, and you have to scroll over back over to the left to see them.