Please give "invisible" enemies cooldown
zoom out a bit, as far i can remember there is some bat type creatures there that fly up to evade your attacks? maybe some of this lava creaters, but they dont go invisible.
sounds to me like a videocard issue of the sorts… (i could be wrong ofcourse)
Are you talking about the shadow skelks?
I have never seen them going instantly invisible after one attack.
There are always a few seconds in which they are visible.
They also don’t move out of aoe afaik. They are always in meele range.
The only thing they might do is porting behind you.
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I think you need to say what mobs are doing this OP as I’ve never seen any do what you are describing. As above, the only ones that usually have invisibility is a skelk or one of the big cats, but only once.
ANet may give it to you.
It’s gotta be the skelks. What profession/weapon are you using? They go stealth, not invulnerable. A lot of autoattacks don’t require a target. Swing wildly and you should still be hitting them. Be wary, I think they may try to get behind you (though I don’t think they have damage modifiers from stealth/positioning).
Some weaponsets on some professions will have a harder time with them due to projectiles being rather annoying to aim without a target (can be done with camera positioning though).