Mounted Offset Problem

Hi there! So I have created very large custom entities and you are able to ride them. The problem is when I dismount from the entity you fall from really high up. So I used the "Mounted Entity Y Offset" to set lower the riding point of the player. However when I dismount it still puts me at the top of the entity and thus I take fall damage again. 

If there was a way to set the "Mounted Entity Y Offset" and the dismount y offset, that would be awesome!