dunkemhigh, thanks for providing added details; those are very concerning thermographs.
I don't think such evidence has been shown in most any Internet site for this charger. I wouldn't expect cells to reach that temperature without triggering the thermal sensor, now I see I am in error. If the charger you have is not faulty, then the Maha C9000 as designed cannot pick up a potentially dangerous condition. Even if the cells you used were faulty, the Maha should have shut down by now.
These are after some time left on charge, not after a short while warming up. All I can say is that they are not the results I'd expect from reading your post.