Creating a floating pane does not work

[pielgrzym]

Hi,
I'm on zellij 0.41.2.

I'm struggling to create a floating pane. I want a tmux-like behavior - Ctrl-Space unlocks normal and 'H' should spawn a floating btop/htop window. I used following bind:

        bind "H" { SwitchToMode "locked"; Run "btop" { 
            close_on_exit true 
        }; TogglePaneEmbedOrFloating;  }

This does run btop, but in a regular embedded pane. I tried running zellij run --floating --close-on-exit -- btop but this hijacks last open pane (if there is more than one) and when I quit btop, I'm left with a floating pane that has been detached (looks like it's the last embedded pane). Is this a bug or am I doing something wrong?