The bug

Both types of torches (torch and redstone_torch) can be placed on the side of blocks that do not have a side that touches the torch

Affected blocks:

• banners
• buttons
• levers
• pressure plates
• rails
• redstone dust
• signs
• tripwire
• tripwire hook

Steps to repeat

1. Place down one of the blocks listed above
2. Either shift+right-click against the hitbox of the block while holding a torch, or attempt to place a torch on top of a non-viable block (such as a slab) diagonally under the block placed in step 1