Note that here a breakout is exactly what happened and the behaviour of the controls in case of breakout is similar to Airbus’s:

> in the event of antagonistic inputs exceeding the breakout mechanism’s activation threshold, the controls would be desynchronised and the control surface would react according to the mean control position.

The breakout threshold is 50lbs, but it’s the combined thresholds, so sudden opposite force applied by two pilots (as apparently happened here) can unexpectedly trigger it. The report confirms there is no warning of breakout situation whether visual or aural.