Caves And Cliffs Igloo not appearing

In the seed -404546743 where a new Cliff is near the spawn, when using the */locate temple * command it should give us the coordinates of the nearest deaert temple-jungle temple-witch hut-igloo. But when teleporting to those coordinates, nothing spawns.

How to reproduce:
-Create a world in the new 1.16.220.52 Beta.
-Activate Experimental - Caves and Cliffs features.
-When in the world, type /locate temple in the chat
-Teleport yourself or fly to the coordinates.
-No structure is generated.

What I expected to happen was:

-Finding an igloo

What happened was:

-There was no igloo, not even underground.