Azure DevOps Refresh Token expires after 90 days

Refresh Token expires after 90 days within active accounts. Is this an expected behavior? What status code do we have to expect when a refresh token expires? I understand when access token expires the status code would be 302 however it's unclear on refresh token expiration.  

ps, Followed this documentation to create an OAuth 2 app: https://docs.microsoft.com/en-us/azure/devops/integrate/get-started/authentication/oauth?view=azure-devops