Treating the symptom only:
Duplicate the layer. Use the eyeball and audio switches in the timeline to turn video only on for one layer, and audio only for the other. Then slide the audio layer to the desired position.
Treating the symptom only:
Duplicate the layer. Use the eyeball and audio switches in the timeline to turn video only on for one layer, and audio only for the other. Then slide the audio layer to the desired position.