Hard missions not counting

[steel6burgh]

So the guides say that if you are disconnected and reconnect during any hard mission it will have to be replayed from the beginning.  what about those instances where you are being teleported to the mission and your teammates have already ran inside the very beginning and started fighting.  Can anybody confirm or deny if you get credit for arriving late?

 

[GoDBoss173]

I got the trophy one hour ago

 

1. You can join the mission at any point ( I joined the roosevelt mission when the mission was almost finished, I would say at around 80% completion)

2. I did 9 missions on hard and the rest on max difficulty and the trophy popped -> you dont have to play all missions on the same difficulty