When changing one function with one default parameter into two functions with zero and with one parameter, clangd only finds second one.

Consider we have Other.h:

#pragma once
struct Other
{
    static void foo(int i = 1);
};

 and main.cpp:

#include "Other.h"
int main()
{
    Other::foo();
    Other::foo(1);
    return 0;
}

Clangd finds both references in main.cpp for foo(), that's correct.

Now, if we close main.cpp in creator and edit Other.h to:

#pragma once
struct Other
{
    static void foo() {}
    static void foo(int i) {}
};

We expect to find one reference in main.cpp for each function.

Actual result: clangd finds 2 references for foo(int) in main.cpp and none for foo().

Additional info: if we keep main.cpp open, it is updated and works correctly.