Doing two or more subsequent setblock commands on the same position when that position contains a block entity desynchronizes that block entity, if the end result is a new block entity of the same type.

Repro steps:

• Place a command block facing east with the command: setblock ~ ~1 ~ air
• Place a chain command block following it with the command: setblock ~-1 ~1 ~ player_head
• Stand on top of the command block and run: /setblock ~ ~ ~ player_head {profile:slicedlime}
• Activate the command block
• Observe the player head

Results:

• The player head remains the same profile
• Relogging re-synchronizes the state

Expected results:

• The player head switches to the default profile without needing to relog