This might be a normal glitch dearie ^^' FeralHeart is full of little issues like this. Otherwise, I'm sure others will rush here and be more helpful than me.
I agree with Echo.
When I used to make maps myself I would also bump into this little glitch. If I am not mistaken it is because it is due to the size of your map, and how much room there is in it. It's a small thing. As long as you run up to the object and are able to run on top of it or are stopped by it I think everything should be okay. Though if there is a fix for it I am sure other users might have the solution my dear. ^^