First of all R&R is triggered by excessive knock...The ECU 'does' remember this because it enacts Rich and Retard maps and slowly creeps back to the factory maps over time (unless of course excessive knock is detected again then it goes back to R&R and so on..) Resetting ECU does clear R&R unless there is a fault in the knock sensor. From memory it is either error 55 or error 53 for a faulty knock sensor. Btw disconnecting knock sensors will cause ECU to default to R&R.
What you are talking about (cold nights etc), I think, is air-flow cut which is 'not!' R&R. Air flow-cut happens when AFM exceeds a threshold voltage. The threshold increases with rpm. As soon as the threshold afm voltage is exceeded, the ECU cuts fuel and ignition. As soon as the afm voltage drops below the threshold voltage, fuel and ignition return, until the afm voltage exceeds the threshold again. It is a binary function.(ie air-flow cut is either on or off). There is no learning or memory involved. Turn the boost down (reduce air flow) and the ECU is happy.
R&R and airflow cut is about the most misunderstood topic on these forums.