Vanishing NPC/PCs during Mega Fates

Was participating in the Odin Fate, in a party. During the Encounter was running into issues healing and "Seeing" important PCs and the NPC itself. Once the encounter started it was fine but as more and more ppl came to the Fate PCs and Odin himself began to vanish. It seems that the priority for Displayable Characters is flawed. Only the characters closest to me were visable which sucks when I ran to avoid an AoE attack and the Main Tank Vanished and took a while for him to reappear on my screen. The same thing would happen to Odin. Would run to avoid an attack and went to re-engage and he vanished for a short while. I would consider this a a major bug that needs to be address so multiple parties of players can succesfully defeat these Fates.

not really what the priority is as I believe is set to around your character, so basically if you are sitting on said npc they will never disapear on you unless you increase the number of players displayed from option in menu in which case they might.