Navigate methods inside a unit (Ctrl+F12)

could you explain that case when I have a number of functions implementation inside one translation unit with an equal names,

e.g. have a base class and three derived, base class contains pure virtual functions and derived ones implement these,

all three class implementations are located  in the same .cpp so when I press Ctrl+F12 , I see absolutely identical sets of methods (for some reason , methods names are not extended by classes names)  and can't to see which class each method belongs to.