I'm sorry, I misunderstood.
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I simply kept playing by saying no to this specific training. Luckily the game let's you choose what discipline you want training in. And the problem doesn't occur during the actual tournament.
But isn't that exactly what is happening?!? They certainly won't have this just during the new quests, right? Or do you mean they should also patch this in the game for people who won't buy the expansion?
I have honestly never played anything that looked this good and ran this fast. And it wasn't buggy for me either. I played this at times 10 hours without any problems during such a session.