When walking long distances i usually just push down the up arrow key and when moving gets boring i keep eye on seperate chat channels..

But when i click any chat tabs, the movement stops.

The problem seems like that the text field  in the chat channel gains focus when i switch tabs and thus the movement is not getting the keys again. Imho it would be better that user is able to pick any chat tabs without gaining the focus to text field Unless user really clicks inside the text field and or specifically presses some shortcut key that would take focus to the chat text field.