What is the ruling on praying behind an Imam who seized the Imamate based on false rumors spread by an innovator, and what is the ruling on praying behind the previous Imam who was falsely described as incompetent?

The matter should be referred to the specialized Ministry, as it is the authority empowered to appoint imams. Opening the door to the general public in this regard would spread disagreement. The imam appointed by the Ministry is the most deserving of leading the prayer, and it is not permissible for anyone to step forward ahead of him.