Bose QC ANC Ultra hiss?

Just got these today and thinking about returning. They sound amazing and are super comfortable, but the hiss in ANC and Aware mode is really annoying. It's not super loud, but I want to use them when working at home, and the hiss can be heard even when playing quiet music.

My question is: Is this a normal level of ANC hiss, or have a got a bad pair?