The bug
Hostile monsters that normally would catch on fire in 'clear' sunny weather, still are attempting to catch on fire and burn in 'rain/stormy' weather. This starts with vanilla server 1.8.0 and happens with all versions after that so far I've tested.
It's easily noticeable by the constant 'fire/water sizzle effect sound' that you get when you put something on fire out with water. (like mobs swimming in sunlight) Thought maybe it was a client sync issue at first so re-logged also to verify it still happens. This does not happen in server/client 1.7.10 or older.
You can hear the fizz sound and it uses durability of the item the monster is wearing in its head slot
/summon zombie ~ ~ ~ {ArmorItems:[{},{},{},{id:"diamond_helmet",Count:1b,Damage:363s}]}Code analysis
Code analysis by @unknown can be found in this comment.
Linked issues
is duplicated by 2
relates to 1
Comments 17
Still occurs in 15w40b.
But only the "fizz"(random.fizz) sound plays, no visual fire (tested in single-player).
Seems fixed in 18w15a, but they still play sizzling sounds as if they were on fire and got put out. This happens if they are in water blocks too.
kind of related, but not really this is totally new and different then 'no rain' due to a specific biome when it supposed to be raining. Also did not exist prior to 1.8.0 I havent checked if this is happening in non-rain biome I will check for that also.