Royal Guard - Interaction with Elder Occupied Maps

Royal Guard - Map Bosses have 20% chance to be accompanied by two Rogue Exile Bodyguards

Occasionally this interaction will occur on the first phase of three in elder occupied maps. The problem being that if you don't pick up the loot fast enough its gone forever because the arena changes.

I don't have game play video to support my attestation but It occurred on an elder occupied terrace map if its of any help.

More specifically it was constrictor occupied*