A “personal conflict” for Conor McGregor and medical issues for a key witness could delay mixed martial arts fighter Artem Lobov’s courtroom showdown with the former MMA champion. Lobov is suing McGregor over an alleged handshake deal in which the Irish fighter agreed to pay him five per cent of the proceeds of the sale of his whiskey brand Proper No. 12. McGregor, who recently replaced his lawyers in the case, vigorously contests the claim. He reportedly made $130 million (€112 million) from the sale of a majority stake in the brand to Proximo Spirits in 2021. The action is…