Only are you allowed to morph into one mob before it breaks, meaning when you try to morph into another, it only shows on your screen and not your friend's. Example:
I morph into a horse. Everyone can see a horse.
I morph into a turtle. Only I can see the turtle.
Alright hopefully I will have enough time to look into this issue. By the way... What exact mod version(s) are you and your friends using? That might be important.
Only are you allowed to morph into one mob before it breaks, meaning when you try to morph into another, it only shows on your screen and not your friend's. Example:
I morph into a horse. Everyone can see a horse. I morph into a turtle. Only I can see the turtle.