Do your 1000xm2s have a very slight hissing noise while ANC is active w/out music on?

Ive read about it somewhere on a review site, but I can't recall the store test models to have it. There was a strong background noise within the store, so I might have overheard it.The noise for me is mainly evident at home or on the office when there is no music playing. It sounds like a small hissing sound, hard to describe, but similar to the sound when you have self amplified speakers set to a high volume without receiving a signal, or a very silent one.Would appreciate any help!