do you tried picking the object with its UID?
There's a picking option called nearest and furthest. Picking the nearest platform to the character should work.
I feel bad, but I dont really know how to use either of those.
For the pick nearest, I tried the following and got all kinds of crazy warping around the layout. I did, PLAYERBOX > ON PLATFORM LANDED, then made a sub event that said PLATFORM > PICK NEAREST TO PLAYERBOX.X, PLAYERBOX.Y and the action for that sub event said SET POSTION TO PLAYERBOX.X, PLATFORM.Y. That doesn't seem too well.
I don't even know how I would go about telling the UID idea to work.