Cannot attack Deathgaze in Central Shroud

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Date & Time: May ‎06 ‎2018 2250PST
Frequency: Always (encountered once)
World name: Brynhildr
Character name: Viertes Oscurita
Monster name: Deathgaze
Class/Level: Lv63 Paladin (screenshot as Lv70 white mage for targetless AoE test)
Party or solo: Solo
In-game time: 619AM
Area and coordinates: Central Shroud X16.2 Y 22.1
Steps:
1. Go to specified area
2. Try using any attacks
3. Produces Target not in LoS

https://i.imgur.com/8QEU79n.png