Scaffolding breaks when placed on some blocks

The bug

Placing scaffolding on some blocks will result in the scaffolding breaking.

Affected blocks

^{List may be incomplete}

• Fence
• Cobblestone Wall
• Chests
• Sign
• Slab
• Flowers / Crops
• Redstone
• Lever / Button
• Trapdoor (Closed)
• Lectern
• Rails
• Cactus
• Player heads
• Grass Path
• Flower Pot
• Enchanting Table
• Beds
• End Rods
• Torches
• Pressure Plates
• Daylight Detector
• Banners
• Brewing Stand
• Turtle Eggs
• Conduit