Problems rendering on tmux

[mxdevmanuel]

There are some issues when using it inside tmux 2.9a, it renders incorrec
t characters and doesn't allow to use arrow keys, neither to use it at all actually, tried in different terminals:

• Termite
• rxvt-unicode
• xterm
• alacritty

using both zsh and bash and evertything works fine on it's own, but in tmux it presents this problem (screenshot in link)

I'm using archlinux and tmux 2.9a

tried installation from AUR, with golang and from source, problem persists and it's only when inside tmux

[screenshot](https://i.imgur.com/J9lV3I5.

Edit

it works when changing TERM variable inside tmux either from tmux-256color to tmux or screen-256color to screen

[qustavo]

Wow, that looks pretty ugly, I've experienced issues like this in tmux as well.
I've tried to fix it some time ago but I couldn't, sorry.
I'm thinking about rewriting the GUI with a different library but that would take some time, so, unfortunately, there's nothing I can do to help now :(
Thanks for reporting.

I'll keep this open so that we can keep track of it, as always, PRs are appreciated.