Consider the following code:

class Base1:
    def foo(self, x):
        pass

class Base2:
    def bar(self, x, y):
        pass

base = Base1
base = Base2
class Derived(base):
    pass

obj = Derived()
obj.

obj2 = Base1()
obj2 = Base2()
obj2.

The list of members provided for obj lists both foo and bar, regardless of whether the "Member completion displays intersection of members" checkbox in Tools -> Options -> Text Editor -> Python -> Advanced is checked or not. This is inconsistent with the behavior seen for obj2, where neither foo nor bar are listed when checkbox is checked.