"Orthodox Christians insist on their right to freely confess their faith in the Orthodox Church as the One Holy Universal and Apostolic Church without conceding the so-called "branch theory" and definitively reject any attempts to dilute Orthodox ecclesiology.
The Orthodox Church excludes any possibility of liturgical communion with the non-Orthodox. In particular, it is considered impermissible for Orthodox to participate in liturgical actions connected with so-called ecumenical or inter-confessional religious services. In general, the Church should determine the forms of interaction with the heterodox on a conciliar basis, stemming from its teachings, canonical discipline and ecclesiastical expediency.
Nonetheless, the possibility of cooperation with the heterodox is not excluded, for example, in helping the unfortunate and by defending the innocent, in joint resistance to immorality, and in participating in charitable and educational projects. It may be appropriate to participate in socially meaningful ceremonies in which other confessions are represented. In addition, dialog with the non-Orthodox remains necessary to witness Orthodoxy to them, to overcome prejudices and to disprove false opinions. Yet it is not proper to smooth over or obscure the actual differences between Orthodoxy and other confessions."
All else is rumoring by those who are attempting to derail reunion between the ROCOR and the MP.
All of the documents can be read here:
Thank you for the information.
P.S. Just a quick reaction to the documents you showed us. What I did not see, but I may have missed it, is a resolution to the problem of the alleged heresy of the MP, one that would fit the conditions set forth by the Canon of St. Basil concerning reception of heretical jurisdictions returning to the fold of Christ.