Cool effect, reminds me of Bastion!
Try adding just one tile object to the family and replacing it everywhere in your events. Once it’s working, you can add the other objects.
Also, I recommend using the Tween behavior instead of lerp. Lerp keeps running for a long time, moving the sprite by tiny fractions of a pixel, which can interfere with other events. Say, if you later decide to make the tiles wobble when the hero steps on them.