Calling women "chick" has been iffy at best for at least 30 years. That's not new.
I've never heard of "Ms." being an issue, though, since it explicitly doesn't make assumptions about marital status like Miss and Mrs. do. I'd guess that someone didn't actually know what it meant.
I've always considered chick the exact same as dude. It's just a synonym for girl/lady. If used improperly it can be offensive, but then I'd argue any sentence you can think of where it's used improperly you could replace "chick" with pretty much any synonym for girl/lady and it'd still be offensive.
I've never heard of "Ms." being an issue, though, since it explicitly doesn't make assumptions about marital status like Miss and Mrs. do. I'd guess that someone didn't actually know what it meant.