Do Muse lip sync live?

Just saw a show in CA, a good show overall but the first 30 minutes seemed a bit off. It didn't have a "live" sound, more like a studio track played loud. Also zero audience interaction during that time, not even a hello or "thanks for coming out" etc.

Later on definitely had more of a live feel - normal imperfections that slipped into the vocals and guitar.

Just curious if this band ever lip sync for sections of their act? I wouldn't hold it against them, just curious if I was hallucinating this...