Cobwebs, beds and grindstones do not update walls to pillars

The bug

The following blocks do not change walls into pillars when placed above, despite doing so in previous versions.

• Cobwebs
• Beds
• Grindstones

For info, this issue was previously affecting the following blocks:

• Pressure Plates
• Banners
• Fence Posts
• Iron Bars (MC-171463)
• Glass Panes
• Flower pots
• Hoppers
• Sea Pickles
• End Rods
• Signs
• Walls (MC-172425)