[MC-233893] Burning mobs won't get extinguished by rain in warm patches of Frozen Ocean biome

Create a Buffet world with biome 'Frozen Ocean' and allow cheats.
Find an area with unfrozen water (which is the warm patches of Frozen Ocean)
Use the command
```
/weather rain 1000000
```
to make rain.
Use the command
```
/summon minecraft:armor_stand ~ ~ ~ {Fire:1000s}
```
The armor stand won't stop burning and will eventually break due to fire damage. (In normal rain the armor stand will get extinguished.)

I guess the bug is caused by deciding rain/snow only according to the biome and ignoring anything else.