Your Teammate has not yet unlocked this challenge

[Janus]

"Your teammate has not yet unlocked this challenge."

In a party with Ryuu (level 130). On Inferno 1 & 2.

Can't start Were things silver duo or Ragestone Rats duo. Am able to start Ugh a Thug silver duo fine. 

Is the person in my party preventing me from opening challenges that they themselves haven't unlocked? I never saw this before. Is it a feature or a bug?

Groups seem to work fine, although maybe Ryuu has those unlocked?

https://www.youtube.com/watch?v=YKGdV4AlZ6E

[Ray]

Definitely a bug at this point. The whole 'duo drag' system from the past was removed, but it looks like there was a bit of leftovers from it.

Fixed in the next patch, thanks!