I launched a byobu session (tmux) and then tried to switch to a user called kommander "su - kommander", it immediately prompted me with:

[Oh My Zsh] Would you like to check for updates?
Type Y to update oh-my-zsh:

Now I usually press "n" and everything is fine, but within the byobu session, when I press enter it just displays a "^M" character. I have no idea how to exit out if this prompt:

[Oh My Zsh] Would you like to check for updates?
Type Y to update oh-my-zsh: n^M