Forums Scripts & Popups Suppress ctcpreply message?

I have no idea how to avoid it or what causes it, sorry.

It's a message from the server, I presume it's not a notice; So to catch it, you might be able to use this:

raw PROP:*Target change too fast*:{ commands }

Or if it has a specific RAW numeric, use that.

Before repeating your actions, you should probably wait the 20 seconds like it says.
It's probably not a good idea to halt this text, otherwise you can't see what's happening...