Invulnerable Unearthed Urchin Mobs

I just did a detonator mission and the monters that came out in masses called unearthed urchins cannot be harmed by lightning or fire damadge.

Found this post through Google.

This is still happening. Died twice today to those. First time I thought my projectiles were flying over them and not hitting their model/collision and got overwhelmed. Second time it looked pretty obvious they werent getting damaged at all.

Using Chaos Damage. 100% sure no Chaos Immunity node/chest was blown up in both cases as well.

This just happened to me. No lightning immunity or other modifiers on them, using Archmage Spark Stormweaver.

just had the same thing, very annoying. there was a immunite to fire damage unearthed, but not lightning.

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happend to me today, urchin totally immune to lightning. not a single hp lost with 56k DPS lightning and cursed them for lower lightning res.

Happened to me just now. Immune to chaos damage (ED Con). Tried zoning but did nothing. They are white mobs, no aura, no mods.

Strangely they got damage at first so some of them were missing between 5% and 25% hitpoints.

Still happening, also ED CON chaos damage build

Same ED/C
Not just the urchin, its the Druidic Familiar of Ignition as well.

This is still happening guys, nothing kills them little urchins!