When opening the project with BIM360 sometimes the link is updated and sometimes is not. When the link is not updated, one expects that Reload does exactly that, loads the latest information from its root document, since the path is BIM360://
That is the procedure described here:
https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2020/EN...
But now you are politely saying that maybe the local cache is outdated and that Reload From forces to refresh the cache. I think that is a good theory. What you are saying is that those two buttons are potentially doing two different things depending on the status of the cache. I cannot find anything in the Autodesk documentation that explicitly says that for BIM360 one must only use the Reload From... button to ensure that the latest information is loaded from the cloud. I also do not see much point on the button Reload as Autodesk has been writing, if the cache is not refreshed. If feels like somebody forgot to call that function in the Reload button.
I read on the Revit API documentation that there is a method IsNotLoadedIntoMultipleOpenDocuments with some interesting remarks.
https://www.revitapidocs.com/2016/7e675de0-ce86-ef2e-fdef-f5e12558684d.htm
But I cannot see that API methods remarks are being reflected in the general Revit Documentation either, or seen any dialog that informs that that is what is happening.
One thing is for sure in our office other users also noticed this issue in other projects, and they also never saw any Revit dialog explaining why the link is outdated some of the times.