I am trying to understand under which conditions submenus disappear.
Now I have seen that the context panel is empty when submenues disappear.
Has anybody noticed the same and are there other instances when the context panel is emtpy?
Both effects could have the same rootcause.
Here is an example:
A -> no submenu
B -> Empty context panel
C -> Menu appears inside workspace (first time I see that)
Update
C seems to happen when the Maple window is not maximized to the full screen. -> then the context pannel becomes empty (for some reason) -> then if the Maple window is maximized to full screen we see C. Opeing new documents do not show this when toggling between 
and 
