The Bug

A client-side desync can occur by placing blocks below you when jumping on top of enchanting tables.

Steps to Reproduce

• Build the setup as shown in the attachment below. setup.png
• Stand between the slab and the enchanting table.
• Obtain a piece of dirt and switch into survival mode.
• Whilst looking at the slab, jump and attempt to place the dirt on top of it.
• Take note as to whether or not a client-side desync can occur by placing blocks below you when jumping on top of enchanting tables.

Observed Behavior

A client-side desync can occur by placing blocks below you when jumping on top of enchanting tables.

Expected Behavior

A client-side desync would not occur by placing blocks below you when jumping on top of enchanting tables.