Shipwrecks and ocean ruins can generate with empty buried treasure maps

The Bug:

Shipwrecks and ocean ruins can generate with empty buried treasure maps.

Here is an example:

Seed: -3841550492582472260
Coordinates: /execute in minecraft:overworld run tp @s -1812.76 40.00 990.41 27.92 22.60

Steps to Reproduce:

1. Generate a world with the seed provided above and teleport to the given coordinates.
2. Open the chest that's in front of you and look at the buried treasure map.

Observed Behavior:

Empty buried treasure maps can generate.

Expected Behavior:

Buried treasure maps would not be empty.