'U' chat won't send

[rasb23]

I know it's old but I just want to confirm that this also happens on mac (OSX 10.11). I also confirmed that I have only found "U chat" in this mod.

This could have to do with Enter/return key differences that are not getting handled by U prompt.
https://en.wikipedia.org/wiki/Enter_key

I'll try to find out more information.