I chose to use the words “not unlocking” because I’m not sure what to call it. I’ve completed all the chapters for Episode 1 on the Legendary difficulty and yet, the weekly challenge for this, “Episode of Legend” will not unlock.
I was curious if anyone else had this issue?
yeah man me and my buddy just did it co-op on legendary… nothin… wouldnt unlock
Having the same problem myself, two missions I had to repeat in order to get the game to even read that I beat them on Legendary, I made sure it shows all of them as complete on legendary and they are yet I still didn’t get the challenge.
I am having the same exact issue, mine show that all have been beaten on legendary but the challenge has not been completed.
Yep! exact same thing says I ve completed all of them on legendary but no challenge 
Same problem. Completed all chapters on legendary, but no credit for “episode of legend.” PLEASE FIX 343!
Tons of topics on this already. Fix is to play them again.