strange behaviour with json_pointer and .contains()

[lianguage]

It seems like the contains method is very picky about how json_pointers are passed in and I can't figure out why. See the example below for what I mean

nlohmann::json j_example2 = 
{ 
   {
      "asdf",
      {
         {
            {"fname","qui-gon"},
         },
         {
            {"fname","aramis"},
         },
         {
            {"fname","donald"},
         }
      }
   }
};

   std::string asdf = "/asdf";

   //these return true
   REQUIRE(j_example2.contains(nlohmann::json::json_pointer(asdf)));
   REQUIRE(j_example2.contains(nlohmann::json::json_pointer("/asdf")));
   REQUIRE(j_example2.contains("/asdf"_json_pointer));
   REQUIRE(j_example2.contains("/asdf/0/fname"_json_pointer));
   
   //this returns false
   nlohmann::json::json_pointer pointer(asdf);
   REQUIRE(j_example2.contains(pointer));
   
   //this causes some kind of crash
   nlohmann::json::json_pointer pointer2 = "/asdf"_json_pointer;
   REQUIRE(j_example2.contains(pointer2));

I'm using version 3.7.0

[lianguage]

I'm gonna test this first with some different flags