It mentions that there are more instances on the A320 than the wide body Airbus types, probably due to the low level of the cowling latches meaning thay are missed. It also emphasises the importance of checking the latches during the crew walk around check.
Interesting contrast between the recommendation in the Airbus Safety Magazine:
Latches on open doors should always be left in a “not engaged” position, which means that they will hang down when the doors are closed and not latched (fig.2) . This ensures easy identification of an unlatched door condition
and the comment by the Canadian TSB in the report on the Skyservice A320 cowl door separation:
After opening the latches and disengaging the hooks from the eyebolts, the normal practice is to re-close the latches to prevent the hooks from protruding and misaligning with the eyebolts when the door is subsequently closed;