Created a Collector app using a hosted feature service with attachments. No issues, app works fine to collect points and photos.
Also created an Operations Dashboard the includes several layers including that hosted feature service.
When I open the Dashboard I get the following message

A similar message appears for several different hosted feature services. The message gives the impression this is a Windows issue. Anyone have a clue what might trigger this message? If I click ok everything appears to work.
Thanks,
Keith