Whenever I type in Jquery validated field on max and min number of letters, I get a refresh of messages even though the error is the same. How do I prevent that so it is less irritating for the users?

The code is

    validations = {
        'rules':{
            'code': {
                'minlength': 9,
                'maxlength': 9
            },

        },
        'messages': {
            'code': {
                'minlength': 'Must be 9 digits',
                'maxlength': 'Must be 9 digits'
            },
        }
    }

I have tried to use showerror(), and check whether the error list is the same, but I can't prevent the previous error messages from disappearing.

        showErrors: function(errorMap, errorList) {
            if(typeof prev_error_map != "undefined"){
                if (!_.isEqual(prev_error_map, errorMap)) {
                    this.defaultShowErrors();
                    prev_error_map = errorMap;
                }
            }else{
                this.defaultShowErrors();
                prev_error_map = errorMap;
            }
        }