It seems with the refresh of the interface in Revit 2019, the addition of icons on the Quick Access Toolbar (QAT) is shifting the file name, even when it is docked below the ribbon...
|Revit 2018 behaving correctly|
|Revit 2019, lots of QAT icons moves the file name at the top of the application bar..|
|...eventually cutting it off.|
I will keep you posted on the fix.