/locate command returns offset or incorrect mineshaft locations

The bug

The /locate command sometimes returns wrong or offset coordinates for mineshafts.

Steps to reproduce

1. Create a Default world with the following seed

   -2310970283287424513
   

2. Switch to Spectator mode to be able to look for mineshafts more easily
3. Use the /locate command to find a mineshaft

   /locate Mineshaft
   

   → It should print "Located Mineshaft at -472 (y?) 1032"

4. Use the /tp command to get to the returned position

   /tp -472 35 1032
   

5. Search for the mineshaft
   → There is no mineshaft nearby