When you are standing in fireplace smoke particles you can see water (I probably explained this badly so I attached a video that I recorded where you can see the bug).
Environment
Minecraft Java edition
My OS: Windows 10 Home 64-bit
My CPU: Processor Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz, 3201 Mhz, 4 Core(s), 4 Logical Processor(s)
GPU: NVIDIA GeForce GTX 1070 8 GB DUAL OC
RAM: 8GB
Duplicate of MC-9553