Coral fans cannot be placed on upper half slab and trapdoors and does not retain its color even if the slabs and trapdoors are waterlogged.
Steps to reproduce:
1. Make a hole in the ground with or without a water source.
2. Place any upper half slab or trapdoor in the hole (with water source to waterlog it)
3. Place any coral fan on upper half slab/trapdoors

Observed results:
Regular and dead coral fans break

Expected results:
Coral fans shouldn’t break when placed on upper half slabs/trapdoor. Should retain color when trapdoors/slabs are waterlogged.