Custom blocks face backwards in third person

Steps to reproduce:

• Download the attached pack

• Take a vanilla Oak Planks block and the custom planks block from the “Construction” tab in the creative menu

• Switch between these blocks while in third person perspective

Observed results:

• The custom planks are rotated 180 on the Y-axis compared to the vanilla planks

• This affects all custom block models, not just minecraft:geometry.full_block

Expected results:

• Custom blocks should have the same item rotation as vanilla blocks