In theory, in the absence of failures, the engines should only shut down due to a lack of fuel flow. And that should only occur if the LP cocks (under the coaming/glareshield) or HP cocks (throttle levers) are closed, the fuel pump controls (centre console) are incorrectly configured, i.e. are not all on, or there's insufficient fuel.
If you get the problem again then please submit a support ticket via our website so we can investigate further.