I was out with my pal and he dismounted me from my horse as a joke. As a result he aggro'd the horse and it started running. After this the horse started taking damage and leaving a blood trail like all other animals do when they flee. The big is that the horse was not attacked or damaged at all, and the horse continued to take damage and leave a visible blood trail long after aggro had been dropped and while someone was riding it around. As I type this it is still bleeding and leaving a trail even after we ported back and put it in a stall. It's acting completely normally other than this.
Steps to recreate are aggroing a tamed horse/dismounting someone so the horse runs away and it will start bleeding as I said.
Pls give me a dev cape for this one guys