When I use the same texture node for both diffuse and reflection I get incorrect results, when I create or duplicate the texture node it does work correctly. Eventually I've builded my shader(latest image) but this issue should be fixed since one of the biggest advantage of the node system is that we can reuse the same node for many different needs, and that complex shader may become a pain to work with when you need to duplicate identical nodes several times.
I attach some screenshot showing the different behavior, if needed i can send you the scene. I'm on OSX 10.11.3, C4d R20 latest Corona beta version.