This is not the first time this has happened to me, but I figured it was time to start documenting it so they can start working on it. I apologize if this has been mentioned elsewhere. Today while trying to do a mandate, the final mob that was required for me to complete said mandate was either spawned outside of the map or above/below it. I have attached a screenshot to show what I mean. https://imgur.com/a/jNZAKmP