The ROCOR-MP has been celebrating hierarchial liturgies with the OCA, a notorious World Orthodox synod, where more than half of their bishops have been forced to retire for unethical reasons of various sorts.
Please do not explore the OCA history in this thread or in this forum. It's best to let a dead dog sleep, and not start any gossip threads concerning the OCA. Besides, it is not beneficial to our salvation.
Anyway, back to the ROCOR. In 1995 and in 1996, I was taking inquiry classes with then Archimandrite Father Alexander Mileant, who was later consecrated as a bishop. At that time, there was considerable discord in the ROCOR due to increasing efforts by certain clergy and hierarchs, notably the Archbishop of Geneva, to join with the Russian Orthodox Church, Moscow Patriarch (MP).
In 1996, way before the ROCOR-ROC union of 2007, the ROCOR was already allowing members of the OCA laity to confess and to receive communion in the ROCOR. Likewise, members of the ROCOR would visit the local OCA parishes and were allowed to confess and receive communion in the OCA even though the OCA followed the New Calendar. Although the OCA and ROCOR clergy were not allowed to have prayers in common, the laity were. I remember being sick on New Calendar Christmas and not being able to attend the Divine Liturgy in the OCA, but I was well and was able to attend the Divine Liturgy in the ROCOR parish 13 days later. At that time, the Calendar issue did not concern me because I had just converted from Roman Catholicism.
However, this practice of intercommunion between the ROCOR and the OCA shows that certain parishes in the ROCOR were more disposed to Ecumenism, because intercommunion is the fruit of the Pan-heresy of Ecumenism.
Strangely, at this time back in 1996, lay members of the Greek Orthodox Archdiocese under the EP, and the Antiochian (Greek) Orthodox Church were not allowed to receive communion in the ROCOR. Somehow, it was okay for OCA laity, considered a sister church to the Moscow Patriarch, to receive communion, but those in communion with the EP, such as the Greek and Antiochian churches, were forbidden to approach the chalice in the ROCOR.