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 a certain point it doesn’t matter as the password is effectively unguessable.
One weakness with longer passwords is that if they are created by humans chances are it will be easier to guess the pattern. This is true for all human created passwords but I think the longer ones are worse since there is more space to create a easily guessable pattern.