The Bug:

Slabs in Shipwrecks can be the wrong half.

Steps to Reproduce:

1. Create a world with this seed: 2560973622528338888
2. Teleport to this position: 97.30 66.50 219.45

Expected Results:

Shipwrecks will have slabs on the correct half.

Observed Results:

Shipwrecks can have slabs on the wrong half. In fact, just about all the wooden slabs are on their lower half even in places where the wooden slabs should not use the lower half.

More information:

• The shipwreck I found had an incomplete mast.
• The shipwreck I found had all its rooms.
• The treasure room I found in the shipwreck only contained a table.
• The shipwreck I found is upright.
• The shipwreck I found is in full, but degraded.

Affected areas:

• The table in the shipwreck's treasure room I found had a slab in the wrong half.
• At the top deck of the shipwreck I found, all the slabs above the treasure room were the wrong half.
• At the back of the shipwreck I found, there were 2 wooden slabs using the wrong half.