Self Close Current Pane not working in this scenario

[Penguin98kStudio]

I am trying to close the empty pane at the bottom using self close command but it doesnt work,
edit: using close empty pane below from the above pane does work but that's annoying and also doesn't blends with my automatic pane close plugin which is utilizing this command.
edit2: in a case where there two column panes and one of the columns is split into two rows, then the self close doesn't work column which is single row(not split in two rows)