when I use /locate to find an ocean ruin it teleports me to somewhere that has no ruins at all. the world was originally created in 1.8.7 My guess is that the game is taking the seed number and finding where an ocean ruin "should be" if I were using same seed but created in 18w09a
Ok, I tested the same seed in a new world and used /locate and what I said may be the cause before turns out not to be the case. So I guess I have no idea why /locate didn't take me to the ocean ruin.