The bug
Some bastion pieces are too long to type into structure blocks.
How to reproduce
Try to type in
minecraft:bastion/hoglin_stable/starting_pieces/stairs_0_mirrored
→ ❌ Notice how the structure block won't let you type in the last letter
MC-178895
Some bastion names are too long for structure blocks
Resolved
Duplicate
0
If you just remove minecraft: from the name it'll still work