Issues with tyk api keys

Hi all, we are facing issues with api keys frequently, when we have added the services under the keys using the tyk-dashboard,we are getting errors like “user not authorized” and “Attempted access with an existing user, failed password check” even we passed the correct credentials(username, password), sometimes its working ,but after days within a week again we are facing the same issue. And also we are facing one more issue with keys like some services are removed from key and some are mismatched and jumped from one key to another key which we configured. can anyone suggest me to help the issue.