[BUG] Slab Preset Doesn't Work

[ZacharyBachary]

Summary
The slab preset doesn't create a slab block.

To Reproduce
Steps to reproduce the behavior:

1. Go to :
2. Click on New File
3. Click Block
4. Click Slab
5. Create the Preset.

Observed behavior
It Creates a block called (input identifier)_double and a loot table that drops a block that doesn't exist.
Expected behavior
Its supposed to create a slab block as well as a double slab block and a loot table that drops 2 of the created slabs.

Platform

• OS: Windows 11
• App Version: [2.6.0]

Additional context
I have every experimental feature enabled and even tried this on an empty project but still got the same result.