Your question is somewhat confusing. However, if I understand it correctly, the other party to an agreement, who was represented by an attorney, has now rescinded, or at least tried to rescind the agreement, and that party's attorney has now removed himself from representation. When an attorney represents a client, there is a contract between the client and the attorney. There are various reasons why the representation contract may end, but a core concept is that the client and the attorney have to work together. If the client and the attorney disagree or are "not on the same page" for whatever reason, then the contract may end. On the other hand, a conflict of interest can be anything from a disagreement, to finances, to a prior client, etc. The bottom line is that trying to determine what has happened on the other side is simply speculation. Wouldn't it be better to focus on what needs to be done to achieve or enforce the agreement you mention? Find a qualified local attorney to assist you with the work on the agreement. Good luck.
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