London Irish v Wasps First Tryscorer

Can anyone clarify who scored the first try yesterday. I saw Jack Willis get to his feet with the ball and indeed Betfair initially paid out on Willis. Today I note that result has been amended and Gagriel Oghre is now declared as First Tryscorer. Just about every match report I've read gave it to Willis but presumably the source Betfair use give it to Oghre. Can any confirm what actually happened?