Expedition Monsters Invulnerable

As stated in title. Spawned expedition monsters. One particular mob - I think it's the extra XP mob - is unkillable. They look like normal mob, no modifiers.
I can curse them vulnerable to chaos but nothing brings their health down.

Also took a video recording showing interaction with the mob.

Same issue happening to me, just spawned a massive mob of unkillable Expedition mobs

Link to screenshot: https://imgur.com/a/vhRXOtI

Bug Report ID is 1,340,448,040

Same issue for me.

https://imgur.com/iXlNti7

#504797365

same thing happened to me twice now https://imgur.com/d9GpTxf

Well, some of the mobs are supposed to be invulnerable to some damage types. It's written in the altar modifiers.
As far as I understand, it's true immunity, not 100+% resist or something.
Or do you mean they are totally invulnerable to all types of damage?

If these are invulnerable on purpose I'm not sure how that's indicated. I do/did chaos and physical. Also odd I was able to damage them to a point and then no more no matter the skills used (I don't have corpse explosion or anything).

I may be missing something, but I don't know what, and I've not had this in POE before except for where it's obvious with a boss or under enemy name etc.

Here's the video, please excuse the clip. I don't record clips, stream, or post videos so REAL amateur on this front.

https://www.youtube.com/watch?v=tP5gCzZteQE

Any news regarding this bug? Still getting the same issue time to time.

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JimmyNZ wrote:

If these are invulnerable on purpose I'm not sure how that's indicated. I do/did chaos and physical. Also odd I was able to damage them to a point and then no more no matter the skills used[...]

It is on purpose and it is indicated in the description of the altar.

You were able to damage them until the altar in question was unearthed by an explosion. From there on they where invulnerable for that type of damage. There may be several types mobs are invulnerable for on different altars of the same encounter.

Same issue here too. Died more than 200 times this league due to unkillable expedition monsters. Sometimes i am just "lucky" and i am able to loot some low rewarding chest but more and more time i face these massive amount of unkillable monsters and if i stay close or stop for a sec i just die..

Make sure you don't do like I do and when you read the buff the altar gives, you forget to read the debuff it gives. Resist/invulnerable to Physical seems to be pretty common. I see it once every 3 to 4 expedition encounter.