I found a bug in the "symbols browser" (with the 10/16 NB but might be the same with older ones !)
1- Open a project with at least 2 classes : Class B inherits from A
2- Activate the option "Show inherited members" in the "Symbols browser"
3- Expand the tree of class B and its "Base Classes" : Class A appears here : It's all fine.
4- deactivate the "Show inherited members" option
5- The children nodes of class B "Derived Class" is still visible and you cannot collapse it anymore.
It seems the tree must be collapsed when you disable the option. I think it should be done automatically ?
Maybe this bug has already been declared, but couldn't find it.