K&N air filter (drop in) better than stock ones?

My stock K11 (prefacelift) has a K&N drop in filter, I know it won't make much difference in the performance department.
However, I heard that the oil of these filter can play up the mass air sensor sometimes, I just wondered if this is true, as having occasional idle issues, wondered if plausible it could be the K&N?
 
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