I've been encountering this bug ever since I started playing last year. I don't know whether it's caused by the inventory key commands for vials .ect, or if it's caused by using commandss like ___ is ready. But what happens is that whenever I go to any text field in the game, the last number key I pressed. Using 2 as an example, the whole text field will uncontrollably fill up with 2s. As if I was holding the key down, it's making it quite hard to chat when I need to restart the whole program to stop this from happening.
Sticky keys, maybe?