Lightless Moray INVULNERABLE

The abyssal depths mob called Lightless Moray (looks like a larger snake with a large glowing green crest above their heads, it's not the smaller ones) is periodically COMPLETELY invulnerable to any source of damage for quite a few seconds. This happens to all rarity variations of this mob.

During its invulnerability, it stays still, performing an idle animation and no further combat actions. However, projectiles and AOE effects caused/launched by it before this idle animation starts do still cause damage and can very much kill you.

Here is a video from player RedExile13 on Reddit:
https://packaged-media.redd.it/jpassfkuummf1/pb/m2-res_536p.mp4?m=DASHPlaylist.mpd&v=1&e=1760526000&s=670b8114d1e60a4da08453e3f1ac5c1ff2877808

I admit I do not have that much of a hard time with them because I'm a chaos DOT lich, so I can just spam totems / aoe pools of damage and wait for it to die when the invulnerability eventually fades. Nonetheless, it sometimes still does take longer to finish a single Lightless Moray than it takes to kill a unique map boss.

There are multiple posts about this on Reddit of other players complaining about it, and reports of people actually dying to these monsters because of it. By hovering them, none of the buffs displayed explain this invulnerability, and there is no further animation/environmental effect (such as the black fog used by some other abyss mobs to protect themselves) that even remotely indicates to a player they should back off.

Please fix this as soon as possible, it makes abyss farming unnecessarily annoying.