Not too sure of the rules, or I haven't even re-watched the try/game, but I thought I saw McManus catch that bomb in his in goal prior to him racing all the way for a try. Should it not have been a 20m restart?
They've been calling one foot in goal as catching it in the in goal and giving them a 20m restart the first 2 rounds. So yes, technically it should've been a 20m restart and thus no try.
It is a very tough call. Play on seems fair due to the situation, it could have been sent upstairs if a Broncos player had an issue.
The main problem was the play. Besides the kick being slightly off target, 3 Broncos attacked the ball on the ground and left McManus open. He caught it, was given a huge hole and a headstart and everyone looked slow trying to chase him, credit to Hannatt for chasing all the way. If 2 attacked and 1 stayed back they might have shut down the try before McManus got past the 10.