Pressing the signpic keybind tries to open the GUI any time it's pressed. This causes some problems. In particular:

• It attempts to open while other GUIs are open, causing problems

• The key can't be rebound to ctrl + [key]. Doing so will cause it to just be bound to control for some reason, which doesn't work and also crashes the game on startup.

I bound it to M, and trying to type "/time" caused the chat to close and an invisible GUI to appear.