Whenever undeads like zombies or skeletons are in the rain at daytime, the fire extinguish sound is played from time to time. However, they are not set on fire.

What I expected to happen was...:
The zombies and skeletons are not affected by the daylight as they are "protected" by the rain.

What actually happened was...:
From time to time you can hear the fire extinguish sound, however none of the undeads are burning.

Steps to Reproduce:
1. Enter the command /toggledownfall to activate rain.
2. Set the time to day with /time set day
3. Place a group of zombies and/or skeletons.
4. Hear how the fire extinguish sound is played from time to time. However, none of the mobs are really burning.