This visual error is causing mangrove root blocks to z-fight with other blocks that are not roots.

Steps for reproduction:

1. Find a mangrove tree and take some root blocks from it.
2. Place 2 root blocks on top of each other.
3. Place another root down separate from the other root blocks and place any block other than a root block on top.

Observed Results:

The top of the mangrove roots renders into the non root block, causing z-fighting with the underside of the other block

Expected Results:

Roots should not render into other blocks like leaves.