Switching header/source doesn't always find correct file

Switching between header and souce, can jump between incorrect files:

Find an example here: qtcreator_header_source.zip

.
├── CMakeLists.txt
├── include
│   ├── a
│   │   └── mod.h      # A::Mod
│   └── b
│       └── mod.h      # B::Mod     F4 incorrectly brings me to src/a/mod.cpp
├── main.cpp
└── src
    ├── a
    │   └── mod.cpp    # A::Mod     F4 incorrectly brings me to include/b/mod.h
    └── b
        └── mod.cpp    # B::Mod
 

Think about it...

Which source will match
include/b/mod.h

Is it
     src/a/mod.h
or   src/b/mod.h

???

It must be possible to get a list of sources and headers and just remove the file-extensions suffixes and then do a check for the maximum matching suffix....
 
So that
include/b/mod.h
will match best with
    src/b/mod.cpp
 

Or maybe (more complex) link all C++ datatypes to files, so that B::Mod will link to 

include/b/mod.h
and
    src/b/mod.cpp

but not to
           src/a/mod.cpp