I have been using the BeanStalk 6.13 version and I think it's really great! I installed it with GApps pico, everything was working fine.
Recently I installed the Xposed Framewok (version 86). Some modules did work fine (e.g. DataUsage), some did not (CallRecording). However now, when trying to make a call, I can make a connection but there is no incoming voice anymore. Sometimes it's a faulty cdma radio, but my hardware is fine.
I found a workaround: After boot any short sound has to be played (I use the music player for two seconds) after that incoming voice on phone calls starts working.
I read about a bug on CM 11. The issue was with Google Play Services, more specifically the checkin service within it (CM bugtracking system , code: CYAN-5728). After installing the app "DisableService", unchecked under [System] "checkinservice", but it did not help. However I noticed that there were TWO checkinservice instances. Why? No idea. Edit: Just found out: One is gms.tapandpay.security.CheckInService, the other one is gms.checkin.CheckinService.
One more suggestion I read in this forum (did not try it yet): Try this in Terminal.. Might work
su
pkill mediaserver
Apart from the workaround I do not have an idea for a proper solution.