the Mnk there have certainly been major problems with NWJS and C2 for us, which is why we switched to Unity for our next game.
Almost every negative review and negative Let's Play on YouTube had bugs in the collisions due to HTML5 not running well on their machine (which were often good enough to run modern 3D games just fine).
That is very unpleasant, is what I hope does not happen to me.
The problem is HTML5, so I think you can not solve this problem? What does Ashley say about this?
I have too much work done to port Unity, although also soon I will have to use unity due to my dissatisfaction with C3.