Can't copy or select command block output

The bug

I can no longer select or copy command blocks output.

How to reproduce

• Get a creative world and give yourself a command block:

  /give @s command_block
  

• Input this command:

  /tp @p ~ ~10 ~
  

• Check "Always active" then "Done"
• Examine the command block output
  You can't copy nor select the output.
  You can't navigate to the output field using the keyboard.