Explorer maps leading to custom structures can cause the server to hang

The Bug

Explorer maps can now point to custom structures. However they are bugged and can hang the server.

Expected Behavior

The structure should be located, exploration map should be given to the player, and the server should continue ticking.

Steps to reproduce

1. Download the attached datapack and install it onto a world at world creation.

2. Run the command /locate terralith:pointer/terralith_yellowstone - notice that the resulting structure should be very close by.

3. Run the command /loot give @s loot terralith:testing/yellowstone_map - this item should point to the `terralith:pointer/terralith_yellowstone` structure

4. Notice that the internal server stops ticking and that you do not receive your map