I have seen this error a couple of times, but figured it was just a bug after the recent AGOL update. However, it is happening again (after not seeing it for a few days).
When I publicly share a map (this one has a single read only view layer shared publicly and uses the ESRI Community basemap), I get a error when I save the map that says I don't have permission to update an item in the map. I understand this error, and I generally find it to be helpful. However, this error is telling me that I don't have permission to update the sharing of the Community basemap that is added to the map.
This happens with other basemaps as well, but the Community one is what I used for the screenshot that is attached.
Is this a bug? Am I doing something wrong?