From TFA:
"No other fusion power plant in the world has managed to run for more than ten seconds"
WEST[1] (Formerly Tore Supra) holds the continuous operation of a fusion reactor record time at 6 minutes 30 seconds.
It's always frustrating where teams build fantastic projects but then make false claims that are propagated across the Internet. Don't get me wrong, 20 seconds for a new reactor is good, they'll do longer. After all, the French did in 2003.