Since the old method CTRL+INS / SHIFT+INS does not work yet as alternative to the newer method CTRL+C / CTRL+V, I often accidentally paste screenplay into the “Name”-property of actors (mostly doors and invisible floor switches). If this happends and the clipboard contains screenplay of more than one line, the designer freezes.
I just tried it again on purpose. The engine tries to format the input. The screen flickers when it does so, but if you select another actor and then select the actor with the incorrectly entered name again, you can correct the problem. Still, I have a bad feeling about this. Does the engine catch this issue well enough?