Disappearing mobs (Big report)

Okay this is now an extensive report of a test I did...

Some people have been reporting issues with being attacked while they didn't see a mob or anything around... Not even a visible dot on the map...

It turns out this is a bug... Technically mobs have skills and attack you in some cases too... They will use them but the mob itself is invisible... This is because it has respawned NEAR you... If you see a mob respawn you see it pop up 1 second and then it disappears but it's spawned and it does attack you... Flying out of the area well not entirely out the area... If you put a player there and you fly up till he is not visible anymore then if you fly back you do see the mob...

So technically any mob that spawns/respawns is invisible till you seem to kind of refresh your line of sight...

Technically you could see this as the Elyos ascension quest bug we had in the beginning... relogging or flying out of sight works fine but isn't the best solution... Maybe you should look into this for all zones out there...

The test was run in abyss... I killed a mob Aether Defender and let it respawn... I couldn't see it when it did spawn but other players flying towards me or teleported could see it... Same happened when the mob spawned again attacking 1 of the players...
I have no idea if AOE works because the mob may just restore HP at huge speed... I had to kill it eventually with upgrading my damage cause it just auto healed...

I need you to look into this one to fix it