flex: 0 breaks all panes

[igortas]

Hi,

I've already opened previously two tickets, and this is continuation of the previous two.
I'm try to set sizes with sx and !important but setting flex: 0 for some of the panes, hides all panes.

sx={{
		flex: ivisible
			? `${pane.size} 1 0 !important`
			: '0 !important'
	}}