Swamp huts don't generate within mangrove swamps

The Bug:

Swamp huts, more commonly referred to as witch huts, don't generate within mangrove swamps.

Steps to Reproduce:

• Generate a mangrove swamp single biome world.
• Attempt to search for a swamp hut by running the following command.

• /locate minecraft:swamp_hut

• Take note as to whether or not swamp huts generate within mangrove swamps.

Observed Behavior:

Swamp huts don't generate.

Expected Behavior:

Swamp huts would generate.