Switching between sessions in tmux using "C-b s" results in blank screen

somewhat similar to this question from whence I copied the image... except that

If I hit C-b s from within sessions (0)-(6) everything works fine. However, if I hit C-b s when I'm in session (7) (not pictured) or above I get a blank screen. If I then repeatedly hit j scrolling down until I eventually get to the (0) session then all the sessions display properly. What else is weird about this is that if I type :choose-session instead of C-b s (per this page) from the problem sessions >=(7), then it works properly.

Any idea why this is happening and how I might fix it?

UPDATE 2016-10-21 19:11:00Z: I'm using tmuxinator w/ byobu mode if that might complicate things a bit.

By default C-b s calls choose-tree with params not choose-session. And there may be some problem with template that it uses in this command.

Try rebinding s directly to choose-session in your tmux.conf

bind s choose-session