tmuxline not following g:airline_left_sep / g:airline_right_sep

[bendavis78]

If I customize my airline separators to use different glyphs, I would expect the tmuxline conf to do the same (assuming I'm using :Tmuxline airline). Currently it uses the triangle symbols regardless of airline setting.

For example, setting the following options:

let g:airline_left_sep = "\uE0B4"
let g:airline_right_sep = "\uE0B6"

Gives this result: