That can happen. It also can and does happen in conventional legal representation. What’s different about Collaborative Practice is that the collaborative agreement requires a lawyer to withdraw if his/her client is being less than fully honest, or participating in the process with less than full good faith.
For instance, if documents are altered or withheld, or if a client is deliberately delaying matters for economic or other gain, the lawyers have promised in advance that they will withdraw and will not continue to represent the client. The same is true if the client fails to keep agreements made during the course of negotiations, for instance an agreement to consult a vocational counselor, or an agreement to engage in joint parenting counseling.