What I expected to happen was...:
to make an entire world with the biome basalt deltas
What actually happened was...:
it became laggy and all the commands i executed didnt work
Steps to Reproduce:
1. create a new world
2. choose buffet world type and then basalt deltas
3. turn structures off so it is less laggy
DuplicateRelated to MC-177896. The lag of the world is probably keeping any commands from being executed right away.