An mcstructure file that can be spawned in fine with structure blocks happens to cause the game to crash if trying to use it with feature files.

Basically, I have an mcstructure file - attached below (aspotato.mcstructure) - ... It can be spawned in with structure blocks in a world. And that works fine.

Except, if you try to use feature files to spawn it in - also attached below, as a behaviour pack, note: it will crash your game (aspotatopack.zip) - then the game crashes. No idea why. This shouldn't happen as the mcstructure is clearly valid because it can be spawned in with a structure block just fine.

A screenshot of the structure in question is also attached below (aspotato.png)