Aquanex2
it looks like your collision box for the enemies are quite small to use in combination with the Shine behavior so the player misses the collision with the enemies when is falling, My guess is because the enemies move up to fast because of the shine behavior and swell on collision with the player they keep still moving up there is no push back for them, so because the player is falling fast too that's why it misses the collision some times.
you can either change the enemies collision box to their full box or make the enemies solid
both of this options worked for me without a problem