y and Y only work once

[WillForan]

In the first invocation of tmux (no other servers), y or Y, will copy or add the selection to the prompt. After that, those keys do nothing in copy mode.

• if I run ~/.tmux/plugins/tmux-yank/yank.tmux, I get one yank. then nothing until I run it again.
• in copy mode, prefix + ^Y always works (text to system clibpoard).
• in default mode, prefix + Y always puts PWD on the clipboard

my tmux config is pretty short

# sed 's/#.*//;/^ *$/d' ~/.tmux.conf 
setw -g aggressive-resize on
set -g default-terminal "screen-256color-bce"
set -g mode-keys vi
set -g mouse on
set-environment -g TMUX_PLUGIN_MANAGER_PATH '~/.tmux/plugins/'
set -g @tpm_plugins ' \
 tmux-plugins/tmux-yank   \
 tmux-plugins/tmux-copycat \
'
run-shell "powerline-daemon -q"
source '/usr/share/powerline/bindings/tmux/powerline.conf'
run-shell '/usr/share/tmux-plugin-manager/tpm'

I don't see any conflicting bindings

tmux list-keys|grep Y

bind-key -T copy-mode Y send-keys -X copy-pipe-and-cancel "tmux paste-buffer"
bind-key -T copy-mode-vi Y send-keys -X copy-pipe-and-cancel ""tmux" "paste-buffer""
bind-key -T prefix Y run-shell -b /home/foranw/.tmux/plugins/tmux-yank/scripts/copy_pane_pwd.sh

I think I'm up-to-date

 tmux -V; xsel --version; xclip -version 2>&1|sed 1q; (cd ~/.tmux/plugins/tmux-yank/; git log -n1|sed 1q)

tmux 2.6
xsel version 1.2.0 by Conrad Parker conrad@vergenet.net
xclip version 0.12
commit feb9611

[WillForan]

looks like the keybinding are progressively escape quoted after each tmux yank plugin command is run:

tmux list-keys |grep 'copy-mode-vi [yY] '

before ^b+^f Y:

bind-key    -T copy-mode-vi Y                 send-keys -X copy-pipe-and-cancel "tmux paste-buffer"                                                                                           
bind-key    -T copy-mode-vi y                 send-keys -X copy-pipe-and-cancel "xclip -selection clipboard

after:

bind-key    -T copy-mode-vi Y                 send-keys -X copy-pipe-and-cancel "\"tmux" "paste-buffer\""
bind-key    -T copy-mode-vi y                 send-keys -X copy-pipe-and-cancel "\"xclip" -selection "clipboard\""

again (yank doesn't work, but quotes get added still):

bind-key    -T copy-mode-vi Y                 send-keys -X copy-pipe-and-cancel "\"\"tmux\"" "\"paste-buffer\"\""
bind-key    -T copy-mode-vi y                 send-keys -X copy-pipe-and-cancel "\"\"xclip\"" -selection "\"clipboard\"\""

Edit:
this only happens when tmux-plugins/tmux-copycat is enabled!

[WillForan]

Already reported here! Sorry for the noise
tmux-plugins/tmux-copycat#121
tmux-plugins/tmux-copycat#122 resolves the issue