More specifically, bad mics.
Wireless mics, I think this really goes without saying, but they really suck. We have so many problems with them. I speak mostly of body worn packs and their headworn mic counterparts. It’s almost always a bad connection which causes loud popping noises. Or a slipped and/or mis placed E6. Tonight, it’s who knows what. I had a mic cutting out. It sounded like the pack was losing connection. But, when he moved it, it would come back. So this leads me to believe it was rubbing against the cheek enough that it blocked the mic enough to cut the audio out.
Either way, it sucks. It’s always a balance of whether it’s more distracting to have it drop out once or twice or for someone to go on stage, interupt and switch the pack out and hope and pray its the pack and not the E6 … ugh.