I was on a beach when a Drowned mob approached me. I went behind some fence walls i had build previously.

I expected that the mob would just come to me and stop at the fence because he can't jump over it.

But just before reaching the beach the mob was floating above the water, then when he stepped on the beach he was floating one block above ground, so he jumped over the fence.

Steps to Reproduce:
1. Set the time to night
2. Find a Drowned
3. Get on a beach
4. Let the Drowned come near you
5. Just before he reaches the beach close the game and open it again