When I ssh into the server and then open tmux, I'm able to enter in Unicode characters. It seems that the problem is specifically with sshing directly with
tmux -CC a -t mySession.
I'm trying to enter unicode characters from my keyboard into text files on my EC2 Ubuntu server with iTerm2 on my macbook using tmux. When I ssh directly into the server and attach to a tmux session, I'm able to enter in unicode characters. If, however, I ssh into tmux directly with the command
ssh -i my.pem ubuntu@ec2_domain.com -t 'tmux -CC a -t mySession', I'm unable to enter Unicode characters.