At this point in time, the only mention (on the internet) of the Bishop leaving the Orthodox faith comes from the website referenced in the original article.
Until something more concrete can be produced, we must put this down as wishful thinking at best on the part of the authors.
At worst, it is slander intended to drive a wedge between the Bishop and his flock!
Intrigues hanging around from the Soviet are not my thing. But I have noticed a greater appreciation of Orthodoxy from other Christians here and there, like Anglicans and Catholics. Tend to be appreciation of ceremony and tradition, priests (most) allowed to marry and the perception of a church with central controls without the seeming excess bureaucracy and intrigues of Catholic church.