The updated /locate command that now includes underwater ruins and shipwrecks returns coordinates where no such structures are located. Same with buried treasure.
Examples from pre-220.127.116.11 generated world, Seed -670219719
Shipwreck -600 y? 200 (structure not found)
Ruins -744 y? 248 (structure not found)
Buried Treasure -696 y? 136 (no treasure found)
NOTE: When same seed used to generate new world, the local area contained sea grass and ruin blocks and treasure, which was not generated in the pre-18.104.22.168 world.
I suspect the chunks had been previously rendered, but the /locate command was still referencing the invalid coordinates for nearest structures.
Please advise if issue with generation or bug with the /locate command.