Tree "expand selected branch" not applied on focus change

While trying to nail the "missing folders in the tree"-issue down, I noticed..
that when opening the tree in a dual view with F8, the current folder is expanded:

But after switching focus between src and dest, the current folder is not expanded anymore.
When toggling the tree view on/off, it looks like in the above screenshot again. I guess this may not be intended?!

My settings:

Thanks and cya.. o)