Unable to paste in terminal opened by App Lab

@GolamMostafa @ptillisch and all
Wondering if maybe something similar to tmux is active within the terminal window.

I remember that @Merlin513 when playing with containers earlier had mentioned TMUX and I remember that my keyboard/mouse operations changed. It was back in
this thread:

And for example I have noticed that in my monitor window (in this case kitty),
if I ctrl+(right mouse button) a context menu does pop up that includes paste.