If backbiting of the layman ranks amongst the major sins, then backbiting of the scholar is much greater.
Category: Manners
Taking delight in the lapse of the scholar his mistake
As for taking delight in the lapse of the scholar and his mistake so as to circulate this amongst the people to cause division, then this is certainly not from the way of the Pious Predecessors.
The cure to that which you suspect to be a mistake
Telephone the one whom you suspect has made the mistake and discuss the issue with him, then consider your position after the discussion.