Horse stamina get low on wagon

Bug Name:

Horse stamina get low on wagon​

Bug Description:

After leveling up horses on a wagon and take them out they are very low on stamina, normally, it refresh full on a levelup but I guess, it stay on the amount where it was, when they got on the wagon.
So if you set a horse with leve 1 on a wagon and its stamina increase from 3.000 to 15.000, the horse will stay on 3.000.
So you have to refresh all horses after getting them out of the wagon.​

How to reproduce/proof:

Buy a T1 horse from stable npc shop (15.000 silver), look on the stamina and put it on a wagon, now level it 3-4 level and remove it from the wagon, to see the result.​