Does anyone else have a problem with this?
I actually completed all five chapters on Legendary solo, and the challenge shows as incomplete.
You can see in my online service record that I beat the chapters on Legendary.
This may be a seperate problem, but if I view the challenges from my stats page (https://app.halowaypoint.com/en-us/#Halo4/olanmills/challenges/, NOT https://www.halowaypoint.com/en-us/intel/challenges), the description for Episode of a Legend says, “Complete all missions in chapter ID -1 is invalid. on Legendary difficulty.”