I’ve been on vacation, sorry to see it’s still not working quite right! I think there is a bit of terminology difference here:
The user selector is what you are trying press Control + Enter here while you have it focused, which is the case I mentioned where it wouldn’t work. By textarea I meant the part with the Note. I am not sure if it’s going to be easy to submit when the user selector is focused, @nat is this something we want to continue to try fix up?