The article “The 1872 Council of Constantinople and Phyletism” by Rev. Fr. Stephane Bigham provides helpful background to the Council of 1872. Metropolitan Philip of the Antiochian Archdiocese has often raised this issue in the past, asking “Why is a heresy in 1872 no longer a heresy today?”
I think we would find with a careful study that the Council of 1872 was not very successful in putting down the heresy, and that there were many instances of ethno-phyletism being tolerated on a smaller scale prior to 1922. That means that this heresy may be close to surpassing iconoclasm as the longest running heresy in the history of the Orthodox Church – a dubious honor, to be sure.