Anytime the RSL remains active during a breakaway, the jumper should automatically plan on pulling the reserve handle anyway just in case the RSL connection fails to activate the reserve container for whatever reason. This lack of awareness regarding the need to back up the reserve pull manually is an increasing and disturbing trend among some of today's jumpers. The average jumper will take more than several seconds to analyze and determine if the RSL disconnection is necessary. This can obviously consume valuable time. No doubt the average jumper would be better off handling the emergency manually by pulling both handles, which is not a difficult task.
Lets examine the cause of malfunctions in the first place.
The biggest culprits are improper packing and rigging, or bad body position during deployment. It's almost impossible to be stable within the first second and a half following a breakaway from a malfunctioning high performance main canopy. Therefore, the typical RSL user is most likely unstable during the reserve deployment. Instability causes malfunctions and allowing the RSL to open the reserve container for you will increase the chance that the reserve canopy will malfunction as well. For those that have one, it should be disconnected prior to boarding the aircraft on a planned CRW jump.