In password security, the longer the better. With a password manager, using more than 24 characters is simple. Unless, of course, the secure password is not accepted due to its length. (In this case, through STOVE.)
Possibly indicating cleartext storage of a limited field (which is an absolute no-go), or suboptimal or lacking security practices.
At least they tell you. I’ve had inputs take the full password and then truncate it silently, so you don’t actually know what they saved. Then, you try to login and they tell you wrong password.