Generally, the CCX I’ve had are pretty active for first 2-3 weeks. Not like a flighty breed chick, but like regular chicks. Once they hit 2.5- 3 weeks, they are definitely slower, sit, eat, drink, sit, drink, eat. The chick may have died bc it was stuck, fwiw. They can also overheat pretty easily, which may cause them to huddle away from the light.
Our current batch of 20 CCX is 2.5 weeks old. We put them in an outdoor pen, with heat lamp (and pen is predator proof with a solid roof). They are relying less on the heat lamp. Of course, night temps are 40s, but these chicks handle cool better than heat.
Don’t forget to give them water -lots of water. They drink much more than a regular chick. Good luck with your CCX experience!