Command Block's last output (in the block interface) displays an outdated result

If you run a command with a command block and then look in the block to see its previous output, the output that's displayed will be from two executions ago. This is true even if the command is changed in between executions.

To replicate:

• Place a command block and give it a command with an output (like /summon or /data)

• Run the command

• Change the command to something else and then run it again

• Look in the block and set it so you can see the previous output. The output will line up with the first command you ran, rather than the second one.

If you continue to do this, the block will always display the next-to-last output rather than the most recent one.

Note: If you set gamerule commandBlockOutput to true, this bug will NOT be present in the chat messages that the command block generates. However, it will always be present within the block, regardless of the gamerule.