Breaded horse display wrong health. At first it show's the right amount of hearts, but after the horse takes any damage the visualized hearts drop of a random amount, while the health remains the same.
Basically the horse takes damage but it's not noticable because part of the health bar of the horse it's invisible. The damage animations works fine.
Feeding the horse makes him regenerate even the invisible part of the health bar.
Duplicate of MCPE-165899