possessed spirit flame following me around map, stopping movement

doing astralobes killed hillock on dunes - we was possessed by 4 spirits, after i killed him i noticed some small greens flames following me. when i stood still they caught up to me, and stopped me from moving. the only way i was able to move was to frostblink out of them. no debuff shows up. nothing. just unable to move - game acts as if my char. is trying to go through a shut door. i was able to frostblink several times to put distance between us. when i got about 2 screens away from where they was they locked back onto me and started following again.
not sure if its a bugged interaction because hillock died mid animation on an attacked designed to lock you in place for the boss fight? maybe one of the possessed mods? i looked on the wiki and didnt see anything under any of the mods though.
am unsure if its a bugged interaction or if its ment to be some form of effect
"spirits follow player to lock them in place after map boss dies" or something along though lines?
after some further testing they have hitboxes, and im able to run into them, but im not able to target them, and pressing my hove corpse key doesnt show anything up either.
it does feel like a bug though.