Zombies & skeletons will not burn from sunlight if they are standing on a slab.
What i expected to happend:
Cleansing fire enveloping the undead spawns and bringing them back to the land of the dead.
They stod atop of some halfslabs and did not burn.
- make a container with halfslabs.
- fill container with mobs.
- wait for daylight.
- Mobs would still burn if they started jumping.
- Also occurs in survival mode