Hi @AYegorova, 

Hmm, in my opinion it could be BIM as well as Fabrication. The same thing happens when you have a file saved locally?

The second thing is that in the meantime have you changed any services, elements in your database?  A circle may appear because Revit tries to find the used elements in the database which could have been changed.

I also suggest to check what will happened when you reload the configuration on opened model and save the project again on BIM360 from the beginning and see how the model behaves?

It would be good to have a file with us so we can quickly diagnose it or connect to you remotely to troubleshoot the issue.