Tabpanel does not adapt height to its content if a vertical tabs is used unless a vflex="min" is specified

It seems that the height of tabpanel depends on the height of tabs if we use a vertical tab (orient="vertical").
I think its height should depend instead on its height's content.

A workaround is to specify a vflex="min" on both tabbox, tabpanels and tabpanel tags (maybe some are not mandatory).
I think that should not be the default behaviour.