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.
I remember some office software that didn’t accept certain special characters but didn’t tell the user and just accepted the new password. I had to bother IT support many times to reset my password.