Coral fans break when placed on upper half slab or trapdoors

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.