Minecraft wiki entry for Development_versions, associated text: MC-160456 – Bee hives filled with honey are missing their top and bottom texture.
MC-160458 – Using a portal in an older world creates a new portal instead of teleporting to an existing one.
MC-160461 – When being activated with redstone, bells always ring in the same direction, even if that should not be possible.
MC-160464 – New gamerules introduced in snapshot 19w36a default to false in worlds from older versions.
MC-160484 – Placing wet sponges in the nether does not update redstone.
MC-160498 – /gamerule fireDamage being set to false does not prevent lava damage.