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.
This shit always pisses me off. I’ve encountered it in like 2-3 places over the years since I started using a password manager, and every time it’s so frustrating and hard to figure out.