Pharos Sirius Corrupted Sprite Zoning

Time: 12:02 PM Central Time
World name: Leviathan
Character name: Nightstrike Shadows
Monster name: Corrupted Sprite
Class/Level: Conjurer/50
Party or solo: Party
Area and coordinates: Pharos Sirius, at the zone line between the top two floors.

The Corrupted Sprite spawned after we defeated the first boss Zu. It aggroed me and started casting it's spells, but my entire party zoned to the top floor. Two member's then turned around to go back down to fight it, shortly after they did the Corrupted Sprite showed up at the zone line on the top floor. It killed me and went back down the stairs. I respawned and when i got back to the Zone after the Zu fight area, the Corrupted Sprite was just beyond the zone line and two of my party member's where trying to fight it. It died without any problems.

I have a video of that happening if you want to see it happening. I don't know if it keept going down the stairs, or if it just despawned and respawned on the other floors like players do.
https://www.youtube.com/watch?v=LQ_y..._51u92vg5BRruA
After looking back on this video i now see that the Corrupted Sprite was still in my Monster Hate list, on the right side of my screen.

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Model Number of the PlayStation®4 You Are Using
- Model Number:CUH-1115A