Ladder function - cannot walk trough the platform?

Hello,

I designed a platform game where you walk a character on a platform.
I added a ladder which works fine but I got an issue that I cannot figure out.

I want the character to be able to climb the ladder through the platform above.
What rule do I use to make the player (actors) top (head) pass through the platform?

At the moment the bounce when colide with player is active so I know thats the issue. But how can I make it only bounce when the feet is touching the platform?

Ladder function is all ok but this small part I cannot figure out.

regards