When using the /locate command, it will generate a completely random set of coordinates. I tried to find a jungle pyramid, it dropped me in a birch forest. I tried to find buried treasure, it sent be to an oak forest, which was completely landlocked.

On the original world i found this bug, the fact that /locate doesn't work is consistent. However when I opened a new world to try to "replicate" this bug, it does work. I'm really not sure why, because all settings (normal mode, commands on, structures on, etc) were exactly the same.