I wasn't sure where exactly you were referring to at first, but I finally found it! It's the spot in the picture below, right?
Looking at it again in my editor, I'm pretty obviously missing a collision box there... Oops! I will fix this in the next update. Thanks for the bug report!
Oh, I see! This is a different issue than a missing collision box. The collision box above the player here is not visible, so it's not considered for collision. I'll have to fix this in the next version too!
