Happens to me too. They are probably able to infer it is not a Chrome from the TLS handshake or they run their javascript fingerprinting and found out that the browser didn't have some Chrome features or behaved differently.
Sadly, it is much more difficult to pretend being on a different browser than it was in the past. :/
Sadly, it is much more difficult to pretend being on a different browser than it was in the past. :/