Untargetable, unkillable rats.

4-6 rat enemies that couldn't be interacted with in any way, not even mouse-over highlight. They were able to do damage to my character though. They seemed to spawn during an Expedition encounter where I used a Pandemonium Sentinel. I exited and re-entered the map as well as using /oos but neither fixed the bug.

yes, some adds that spawn due to events seem to be bugged.

i experienced the same issue in the catarina fight on my playing account yesterday, she throws some eggs which you're supposed to run over to destroy them but they were untargetable and i just died everytime running over them.

Ran a corrupted t16 Port map on Standard with Alva daily mission, Eater of Worlds influence, one Sacrifice fragment and iirc one rusted Strongbox and one rusted Elder scarab. Found a Gwennen expedition encounter and got attacked by invulnerable rats. I play a Death's Oath/Blight build.

They damaged me enough to take away my ES but not seriously hurt my life but I also have high mitigation and regeneration.

After killing every single monster except those rats the counter said: 6 monsters remain, so they're obviously getting counted.

Bug report number: 3.754.104.444

Also, there is a similar thread here where I got notified I "didn't have permission" to post:

https://www.pathofexile.com/forum/view-thread/3176081

Edit: these rats are slow, I could run away from them.