Yes. I've been in rooms and at events where people were referred to as such.
Again, this 100% stems from someone tweeting that they don't want to be referred to as cis. They were never called that before and don't want to start now. And my question (still is), is this offensive to those who use these labels regularly? I honestly do not know.
The reason I ask questions like this sometimes is because I am offended by nothing. Youngest of 10 kids (7 older brothers) from Philly, in a union household where every race, creed, age and type have spent time in my house eating at our table and nothing was ever off limits. And I learned that MOST others (especially blacks) share this lack of a radar. I like everyone. I also joke with everyone. And I avoid people who take themselves too seriously. But I also, live by the premise that if you don't know something, ask.
So, in this new world of language and genders and broken barriers, sometimes you gotta ask if something that was OK 2 years ago is still OK today. You know...like the OK sign, which apparently isn't allowed to be given anymore.
So, a person said this thing about not wanting to be called cis. It seemed like a "hot take" or whatever you'd call it. And I have absolutely ZERO idea if that's an offensive thing. Because I do know it's offensive to "mislabel" or "deadname" someone. But can you shrug off a label you don't want given to you like that? Most people aren't in tune to the non-binary language of today. And most people don't know what's offensive to say anymore because of it. So, I ask if I don't know. And, as you can see, that in itself offends people here.
I guess some people think you should wake up everyday with new programming, where you should automatically know what has become popular, unpopular or offensive before every interacting with it.