Mangrove propagule invisible when placed in flower pot

Steps to Reproduce:

1. Place a flower pot
2. Try to place a mangrove propagule in the flower pot

Observed Results:
The mangrove propagule cannot be placed in the flower pot.

Expected Results:
Mangrove propagules should be able to be placed in flower pots.

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Original Description
When i am building mud house and making something beautiful, I put mangrove sapling in to flower pot and it's vanished. I have some video footage below.