Occurance of Variables are not highlighted correctly (Clang Code Model)

With the Clang Code Model activated the occurance of variables is not highlighted for all places the variable is used.

numOfEventsFileName is used in the next code line (red marking)

_dcBAFS is a boost::shared_ptr, byteArray is a method of the class.

_dcBAFS can be resolved by pressing "F2"

byteArray() can be resolved by pressing "F2"

and the red underlined numOfEventsFileName can be resolved by pressing "F2", too.

So all seems to be there to understand that numOfEventsFileName is the varible just defined in the line before.

Why is it not hightlighted?

Oh, and just in case you might wonder: Without the Clang Code Model it is highlighted...