There may be cases where the Service Groups and AureaMonitorIntermediary.xml file are not in sync and end up with different endpoint URLs, especially if the URLs were recently updated in the console. It may happen that the XML config file is still pointing to the old URLs with traffic still being routed to the old URLs.
If this is the case then you should check if the WADL referenced in any Service Group is still using the old URL. If so, then you will need to update the WADL to use the new URL and then update the WADL on both, the Access Point and Managed side.
If you need to update a lot of WADLs, then you can do so by updating the configuration of the Service Groups from the console or automate this task with the Task API. Check the two articles to learn more about export profile/provisioning: