An impressive app, if you ask me. It does look as if the proximity scales are moving, but that doesn't mean anything if the phone isn't registering my actions. I checked and service mode followed by calibration of proximity sensors, might fix it (according to some forums). I'm away from my PC and will have to revert to stock, to try this out.
So sorry if I at all hijacked the thread, for a while. I honestly thought that the issue may have been caused by a bug, at first.
Thanks for your insight and kindness.
Look forward to future iterations of CM12.
Regards.