Ah - I thought you were asking this question because of the opening typeform indicator...but your issue is really with the fact that there is a typeform terminator following the dis. And, you are right. You cannot use the dis contraction in that case. I'm sorry I didn't fully understand the question. If you look at 10.6.2, the very last thing, there is an example of disturb and the dis contraction is not used.
Thank you for clarifying this and continuing to ask questions.