Upon the latest update to Power BI, ALL of my reports have their data models scrambled upon opening. Instead of the nice layout with lookup tables and main data tables, everything is organized in a scrambled star schema. If I rearrange how I like to view them and save, it does no good as when I open the file back up the next time, it is completely scrambled again. This is terrible for complex data models and trying to make sure relationships and structures are setup exactly how you want them. PLEASE FIX.
Issue has been fixed in newly released Power BI Desktop.