Functions menu in Keil IDE not working properly

Is it me or the Functions menu behavior is erratic in Keil IDE? I am running 5.29. Sometimes I see proper contents: file names and "+" can expand function names for each file.  Sometimes I see this:  just a bunch of function names without any relationship to the files where they are defined.  But most of the time the window goes completely blank for no apparent reason.  If I restart the IDE, it reappears again but will eventually disappear again. I am testing on a single project that I have built.  And it is one of the examples from the official Pack and it contains standard stuff, like HAL drives, some CMSIS stuff, etc.  

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