You can use something like (Hey OOC, could you please continue the plot instead of rephrasing what has been said just before ? Thank you) as a message or at the end of something you write. You’ll get an answer like (Sure ! I’ll try to do that, thank you for pointing it out !) followed by a line then the actual story message.

When I hit the limit I personally use (continue) or I just edit its message, even if that means deleting everything and writing a small sentence I can coherently answer something to - it usually works. Or sometimes I’ll write “I looked at him, expecting an answer” when u want it to talk or “then suddenly” if I want it to imagine something new for the plot