As I understand it (could be wrong!), any ceramic pan will lose its non-stick properties if you overheat the surface. The instructions on the pan I just bought say that if you go over the temperature limit you must air out the room well, which I take to mean there's some kind of chemical breakdown of the coating which occurs. And overheat in this context means going above 250C, which is not all that high if you're preheating a pan with oil in it prior to adding food. It would be especially easy to get above that if you were aggressively preheating a pan before stir frying where you want a bit of sizzle as soon as you add the food.
Maybe this is why the manufacturer's customer service line made such an odd comment about adding food to a cold pan and then raising rhe temperature (which I agree is not a great way to cook). For curries where the pan temperatures will be limited by the addition of base gravy, then I'm sure it's not going to be a problem.
How do you find curries cooked in your ceramic pan compare to those from aluminium pans SS? I've always thought a bit of stickiness is needed to get the contents to caramelise a little.