Pope Francis visited Egypt in 2017, and signed a joint declaration with Tawadros announcing that their Churches would recognize the validity of each other's baptisms.
Previously, the Coptic Orthodox Church had repeated baptism if a Catholic had sought to join it.
Conservative members of the Coptic Orthodox Church have reportedly resisted such reforms under Tawadros. According to a commentary by Engy Magdy in the Catholic Diocese of Brooklyn's The Tablet, these conservatives are associated with Shenouda III, the immediate predecessor of Tawadros as Coptic Orthodox Patriarch.
The dispute goes back to tensions between Shenouda and Fr. Matta El Meskeen.
Fr. Matta was tasked by Cyril VI in 1969 with reviving monastic life at St. Macarius Monastery. The monk was focused on the spiritual life, openness to the thought of other Churches, and ressourcement.
While Shenouda was a disciple of Fr. Matta early on, after he was elected Pope of Alexandria in 1971 the two came into conflict. Shenouda restricted Fr. Matta to his monastery, and discouraged the reading of his books, according to an essay by Mina Thabet in Middle East Eye.
It was during this time, in 1984, that Epiphanius joined St. Macarius and became a monk. Epiphanius was a disciple of Fr. Matta, and was involved in ecumenism.
St. Macarius Monastery was long independent of the Coptic Orthodox hierarchy, but Shenouda restored it under the Church's authority in 2009, and appointed some 70 conservative monks, among them Saad and Mansour.
In the year after Shenouda's 2012 death, Epiphanius was elected abbot of St. Macarius, and consecrated a bishop.