When I resize a terminal window containing a tmux session, tmux doesn't detect this change, but continues to function normally within the old window boundaries.
tmux ls shows no other attached clients before I attach:
$ tmux ls admin: 1 windows (created Mon Apr 27 15:12:58 2015) [272x75] apt-runs: 3 windows (created Mon Apr 27 15:17:50 2015) [272x75] lal-dev: 4 windows (created Tue Jun 9 12:24:25 2015) [238x73]
This only happens with a particular host (running tmux 1.9a), and detaching/reattaching fixes the issue (until the window is resized again). What might be causing this?