Blood Boils from Nameless Lurkers deal damage to the player as companions

I caught a Nameless Lurker from the Viridian Wildwood as a companion and when it charges and leaves blood boils on the ground they deal damage to me.

https://imgur.com/a/hhzEWm4 (The companion)
https://poe2db.tw/us/The_Viridian_Wildwood
https://imgur.com/a/T6ZkMjF (Companion making blood boils and them exploding, dealing damage to me and applying Corrupted Blood)