There's a bug which creates problem when doing Bounty missions which are not hero only quests
This has happening for a long time, just been patient to see if issue got resolved without thinking to report it
So i'm not sure of the details
I think it was obtained from the chest in act 4? cant remember if it was normal or nightmare
But a Lv. 99 agent appeared with non english text
https://postimg.org/image/s4dogyclj/
When trying to select agents for the mission all agents are stacked together
https://postimg.org/image/ig1ev3ajj/865ad6d8/