I've a RadCollapsiblePanel that contains a radpanel (dockstyle.left) plus a radsplitcontainer (dockstyle.fill).
The radcollapsiblepanel sizing mode is set to .FitToContentHeight.
It collapses ok, but when it expands it seems to resize to the content height correctly but the contents aren't being restored with it. See attached file.
I've tried resetting the contained splitcontainer dock to botton, then fill, but that made no difference.