Mangrove wood block doesn't appear on the map

Mangrove wood block doesn't appear on the map at all, which causes inconsistency with other mangrove blocks. It is supposed to show the color red when appearing on the map.

How to Reproduce

1. Place a layer of mangrove wood
2. Create a map

Observed Result
There is no mangrove wood block appearing on the map as the red square

Expected Result
The mangrove wood block should appear on the map