Mangrove Tree "root_block" Incorrectly Replace Blocks Listed in "muddy_root_block" Feature Rule

In Bedrock Edition, when a mangrove tree grows, its mangrove_roots blocks (called root_block in features) incorrectly replace existing muddy_mangrove_roots blocks (called muddy_root_block in features) in the world. This behavior is inconsistent with Java Edition, where muddy_mangrove_roots blocks are preserved and not overwritten by the growing mangrove_roots during tree generation. This discrepancy violates parity between the two editions.

How to Reproduce:

1. Create a 20×20 area filled with muddy_mangrove_roots blocks, stacked to a height of 5 blocks.

2. Plant a mangrove propagule in the center of this area.

3. Use bone meal on the propagule to accelerate growth into a full mangrove tree.

4. After the tree fully generates, inspect the area where muddy_mangrove_roots were originally placed.

Observed Result:
The grown mangrove tree's mangrove_roots blocks replace the pre-placed muddy_mangrove_roots blocks.

Expected Result:
The muddy_mangrove_roots blocks should remain intact and not be replaced by mangrove_roots during mangrove tree growth, matching Java Edition behavior without unintended replacement.