I'm experiencing a strange problem with tmux appearing whenever I enter copy mode and I have multiple panes. Basically, after I select the text, when I press Enter (vi-mode) or Alt-w (emacs-mode) a lot of strange characters appear on the terminal.
Here you can see two example demos of what I'm saying
If it can be useful, I'm using the bash shell with the solarized-dark theme.
How can I fix this?