I think the answer is yes, CC products are using a new CSXS version (6.1).
There's some updated information here: CEP-Resources/CEP_6.x at master · Adobe-CEP/CEP-Resources · GitHub
I found this article about some of the more significant changes useful (and shocking): HTML Panel Tips #19: CC2015.1 (CEP6.1) Node.js Fixes | Photoshop, etc.
Thanks for the reply. The issue for me was that CEP 6.1 now handles events differently. You know have to call any key strokes as an event if you don't want the app to take focus away.