getting a hunt reward with out doin it on plains of eidolon

[megarayquaza10]

First of sorry for the bad english
Well this happent while i was opening a zaw riven ( get 1 fish , 1 ore , 1 enemy killed on 30 seconds) i was on solo mission 
I was using revenant at night time i got the mod veil and when i go to extract out of the blue i got a unidentifed item and a eidolon shard 
I did not encounter or fight the eidolon i though it was a visual bug but nope it was real i tried to take a pick of the mission complete screen but steam shows the pick with a error and the image is broken on my pc fouder so i when to my operator and took a screen of the shard and the arcane i got is arcane warmth sorry if this is not enoght but its all i got