Is the twenty-sixth snapshot released for 1.13.
New water physics
Water can be placed in chests, trapped chests, stairs, slabs, fences, walls, iron bars, and glass panes.
Water can flow out these blocks, but can not flow into them.
When full of water, they will count as water blocks for all gameplay (such as swimming).
Water will flow out of all faces of the block.
Removed the blocks flowing_water and flowing_lava.
Removed the block tags water_hacked and waterlogged.
All of the blocks that water can be placed in now have the block state waterlogged.
Blocks such as bubble column or kelp will always count as a water source.
Phantoms are now considered undead mobs
This means that they are harmed by Healing potions, healed by Harming potions, ignored by the wither, and affected by Smite enchantment.
14 issues fixed
From the 1.13 development versions
MC-122171 – Sponges suppress updates, can cause crash
MC-125216 – Graphical glitch: some water faces not rendered on and near hacked water
MC-125417 – Real water above hacked water doesn't render when there is no other water rendered in the same chunk
MC-125467 – Lily pads can't be placed on hacked water
MC-125479 – Hacked water blocks with a collision box allows breathing
MC-125594 – Fishing rod bobber falls down into the sea grass, kelp, coral and waterlogged block
MC-125596 – Fishing rod cannot catch fish when the bobber is in hacked water
MC-125662 – Real water doesn't connect to hacked water
MC-125845 – Hacked water doesn't hydrate farmland
MC-125846 – Sugar cane cannot be placed beside hacked water
MC-125870 – Hacked water does not extinguish burning mobs
MC-125890 – Bucket and bottle don't work on hacked water
MC-126137 – Waterlogged blocks don't help create new water source blocks or react with lava
From the previous development version
MC-126868 – Dead coral variants have incorrect names, <Color> Dead Coral should be Dead <Color> Coral