Crafting Polished Basalt in the crafting table/2x2 grid gives only one block.
How To Reproduce:-
Step 1:- Have a stack of basalt.
Step 2:- Be in survival mode.
Step 3:- Craft Polished Basalt through the 2x2 player crafting grid in the inventory/crafting table.
The outcome of crafting a Polished Basalt is one block.
When crafting Polished Basalt it should give 4 blocks as outcome.
Hoping this information is helpful to fix the bug.