Locals view not update correctely when debugging std::set variables

the std::set<MyStructure> data, and I defined some compare operator to keep a collection of MyStructure variables order, like ==, >, < operator.
the std::cout prints show that my operation to the set data is correct. but locals in the right view is wrong, it show that I have a lot of variables that have same values.

My hardware is E5 2690 v3 with normal memory(Non-ECC)