'Iterm + tmux doesn't respond to screen resize

I've the setup of Iterm and tmux along with Eternal Terminal to have persistent connection to my dev machines. I'm running into this issue once in a while when I try to resize the iterm window actual command line window (I'm guessing tmux) doesn't respond to the change. So far only way I get around this issue is by killing and starting new session.

Screenshot of the issue

Is there anyway I can refresh the screen to fix the issue without killing the session?



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