Related symbol - Looking for associates files

Hi,

This has been happening enough recently that it is getting annoying. I use the Navigate/Related Symbol shortcut (ctrl+alt+home) to toggle between the .h and .cpp files. Sometimes, mostly when performing changes in the header file, when I use the shortcut instead of switching I get a popup "Looking for associated files..." and this takes a while to operate (> 15 seconds, so I always end up pressing cancel and open the file manually).

Now I suppose the feature would let me switch between the implementation of a class in the .cpp and the declaration in a .h that would be in a completely different file but that's not my case at all. I just want a FAST shortcut to switch between a .cpp/h with the same basename, there should never be any searching involved to switch between a .h and .cpp file (even more so when both are already opened).

If there is already a setting for this I haven't found it. 

Regards

Marc