MNX - I don't know how well superglue will hold up to the heat generated by the brakes and hub. Is it popping out of the front or the rear wheels? If it is the front it may be a heat build up issue where the pressure builds behind the center cap and pops it off. Or it could just be a symptom of impropper fitment of the center cap (i.e. not properly sized from the factory).
Reach out to the manufacturer of the wheels and see if they will give you a replacement and keep your fingers crossed that the fitment is better.