All you ever see on SCN is threads about this. There's alot of speculation over the causes. I think alot of it is to do with heat because they run really really hot, hence why i gave the IC and rad upgzrade with higher spec oil and heatwrap to manage the heat.
Revos cupra went bang which led to seat dropping them from their dealership network after neithet side accepted responsibility for the cause. I believe its to do with piston rings and blow by whichrevo claim to have cured with their latest revision.
Revo blame the original vag code has not being written well enough to work within the the excessive heat generated in the engine causing mass overfueling thus misfires