How to enable copy from system clipboard in mouse mode (Mobaxterm)

[jiang-yuan]

I am using MobaXterm and connect to SSH with tmux. After setting tmux_conf_copy_to_os_clipboard=true in .tmux.conf.local, I can copy from tmux to os clipboard. But when I try to paste from clipboard via right button of my mouse (this works in non-mouse mode as I unbind -n MouseDown3Pane), but in mosue mode it does nothing and cannot paste anything.