@baris said in username length problems:
That's weird, when I lower the max username setting to 14 and login with a user who has a long username (21 characters in this case) I can still edit my profile and add location/fullname etc.
Are they getting an error when updating the profile fields or when trying to change the username?
I will ask but it should be during updating the profile because unfortunately, they cannot change their usernames after the registration. They can only do so during registration.