We have four of the major brands of intake with what appears to be the same symptom in the US. Reading the Mazdaspeed forum it seems this is occuring in roughly around 30% percent of cases. There are (I think) 8 MZR intakes installed on GEN 2's here. Possibly more than other brands? Which would explain (I hope) why these are the first instances reported.
Given the shear difference if population and how new the model is it's not suprising this concern was raised there first. 2XS is on the right track asking about the production date of the vehicles. Perhaps there is a fault or a difference in PCM software that is behind this. There's also a chance I suppose that this is not related to the SRI mod or that fitting the SRI unveils are pre existing concern like the stock downpipe has been known to hide a smoking turbo. Just throwing ideas in the air so to speak.
Turbosmart SU BPV // MZR Performance Intake // Medieval Inlet pipe // Medieval rear engine mount // RKM shifter Bushings // SLS Racepipe // Eyelids