Ocean monuments occasionally do not generate correctly

The bug

Ocean monuments occasionally don't generate correctly. Rooms are not where they are supposed to be.

Examples

1. Seed: -6299177223076825039

   /tp @s 5317  52 4774
   

2. Seed: -9144014475768710727

   /tp @s 761 60 -318
   

3. Seed: -809163679142831631

   /tp @s 140 60 -210
   

Note: This occurs seemingly random and is not always reproducible.