Basically, I entered a new world (just default, nothing changed), but I was using a resource pack. When I entered the new world, I changed my resource pack aaaand the water had the texture of the melon stem, I think it was. I changed it again, and this time it was the andesite texture. It was a bit wierd.

What I expected to happen was...:
For the water to have the texture of water.

What actually happened was...:
It didn't look like water.

Steps to Reproduce:
1. Make a new world and enter it while using a resource pack.
2. While still in the world, change your resource pack.
3. If you keep changing your resource pack, it will keep changing the texture.

Note- I didn't look into this too much, so I don't know if it happens only sometimes, or with certain resource packs.