Summary:
When trying to open a repeating or chain command block, its GUI won't open. Impulse command blocks can still be opened fine.
Steps to Reproduce:
Give yourself a repeating and chain command block.
Place them down.
Try to open them.
Observe that they can't be opened despite being in Creative mode.
Linked issues
is duplicated by 14
9 more links
Can confirm, the same happens when you change the mode from Impulse to Chain or Repeating