Inability to copy and paste in general. (Not just on books.)

Put the summary of the bug you're having here

When attepting to paste a command foe an armor stand I thought it was going to successfully paste the command in.

It failed to properly paste in the command.

Steps to Reproduce:
Ctrl + C the command
Ctrl + V the command into a command block or chat
Be sad because you really wanted an epic castle with armor stands in it.