horses cant jump on friend world!!

Horses cant jump when youre at friend's world,,

This is happen when i and my friend race with horses,, but when i wanna run jumping,, it just jump on place,, it doesnt move. But its fine in my world

And a few bugs
-horses cant be pushed or drag with lead when he eat grass(when you are drag him while eating grass, the lead will unleash,and that is very annoying when youre find horses long way from home)
-Map pointer on boat still not fixed, that happen when you move the boat not the camera(the pointer doesnt move when you move the boat , it just messed the pointer make me confuse to go somewhere with map)