Water in cauldron isn't tinted

Can confirm. It's like a silvery color. Kind of looks cool since it's in a metal cauldron, but yeah.

This might be related to lava being the wrong tint? MC-128233

That is the texture of water since snapshot 18w15a. Placed water only looks different because Mojang decided to display the water texture purely off of the biome, not both the default texture and the biome.
This video shows what else the texture change affected: https://www.dropbox.com/s/pk3hjxmlf5q4amj/White%20Water.mp4?dl=0

Based on that, the bug name should be changed. A fix for this should be to change any loaded water source/flow texture to match the biome, not just the water block. (This bug is the same with flowing water too).

Relates to MC-128248

Can confirm for 18w16a.

Still an issue as of 18w16a

That's already marked as affected; please look at the affected versions before commenting.

Relates to MC-128276

Confirmed for 18w19b.

Affects 18w20a

nice catch I only thought of 2/3 I thought the texture and everything was dynamically to the cauldron already but, guess they forgot to color it with the new biome args no longer grabbing the right texture

I could address a work-around with resource model pointing to water overlay texture.

Although this texture lacks an animation; at least it has colour.

Fixing this "Water in cauldron isn't tinted" bug caused the Cauldron break particle to be tinted too, you notice it a lot more when using a resource pack.

This means the cauldron break particle is using the water tint colour.

https://bugs.mojang.com/browse/MC-1874