Ball movement through active object

I have this onject with the ball movement and when it drop on a active platform I make it stop.
But the ball movement object often stops a little in the platform instead of just op the outside.

It's like you can see the charadters legs in the platform. Sometimes it's ok other times it isn't precise.

How can I make sure that the ballmovent object (player) will always stops precise on the active platform?

Ah found it!
for other peeps with this problem:

Always +when object isn't colliding with other object------set y position of object +1

seems to work fine!