Party member in labyrinth is dead to me but isn't actually dead

My party member is dead to me on screen in the normal labyrinth, while he is actually alive.
His corpse in on the right side (where the diamond shrine effect is).
The party frame also shows him dead.
His actual character is on the left side of the screen where he is casting spells.

It happened when he got very low on life in a sawblade trap. He flasked and flame dashed away but to me his character died.




Edit: After a few minutes and after getting some distance between us (not being able to see him on the minimap at least) his character reappeared and his lifebar started working again.