That's the concerning part. But then again I've seen a lot of people go on social media to call out a business where someone wasn't wearing a mask or had one below their chin, but then like 20 people will chime in that they go into that store almost daily and everyone has masks on. You never know when you might catch an employee or two (who might wear a mask for 7 hours out of an 8-hour shift) with it down under the chin after just taking a drink of water or something.
A friend did have one interaction in a backwoods country store up here in VT where the woman at the deli counter making sandwiches had her mask down under her chin and a customer asked her to put it up while making his sandwich. She replied that she has serious lung issues and can't wear the mask, which then devolved into an uncomfortable conversation with her about why she is in that position interacting with so many people if she is so high-risk that her lungs are that bad she can't put a mask on for 5-minutes. She didn't really have an answer. Always a risk embarrassing someone making your food though, ha.