Sometime ago we had a series of events in the poor vis sections of our sim training. The instructor would fail the GO AROUND mode after inducing a low level go around due to another failure or winding the vis/cloudbase right down. Even if you selected TOGA, the FMS was stuck in LAND mode. You had to disconnect the autopilot, ensure TOGA thrust and hand fly away from the runway. Any crew that didn't would find the box on legs heading downhill, with the thrust rolling back. Not pretty.
Sounds familiar... Sometimes longer de-briefing.....