Hi all not sure if it is the sensor part or not, but on inside of AirPods next to the mesh grill the little black circle on my gen 2’s is slightly raised and a little rough. I took the 1st set back because of this but the replacements also seem to be the same. I don’t recall this on my old gen 1 AirPods. But these gen 2 seem to have it? Is this right or just 2 bad sets? Thanks