Anyone experienced similar behavior last week? Our model is located in BIM360 and all of the users were experiencing blue circle spin that would stop for 2-3 seconds and repeat again only on this specific project. Lasted for at least 3 days. We thought it was Fabrication related issue but today it resolved on its own. Interesting fact was, that we tried to reload Fab configuration and it stopped to spin and worked fine but after sync and reopening the same file the issue reoccurred. 

Similar behavior was observed when GUID was lost but this time it was something different.