The bug

The structure minecraft:village/common/animals/cat_jellie spawns, in contrast to what its name suggests, an "all black" cat (CatType: 10) instead of Jellie (CatType: 9).

All other structures seem to spawn the correct cat type.

Reproduction steps

1. Place a structure block
2. Enable "Include entities"
3. Load the following structure

   minecraft:village/common/animals/cat_jellie
   

   An "all black" cat is spawned