Tmux stops responding to key bindings after xclip usage

Instead of:

bind C-c run "tmux save-buffer - | xclip -i -sel clipboard"

I ended up using this code:

bind -t vi-copy y copy-pipe 'xclip -in -selection clipboard'

With such a binding to copy something to the X clipboard:

Press CTRL + b + [
Hit the SPACE
Select the text using vi-mode key combinations
Instead of Enter I hit y and without any freezes text goes to the system clipboard.

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