In one of my projects, the file name in the title bar doesn't change when I navigate between groups with different files open. If I open a new file, the file name in the title bar changes as it should. In my other projects, the file name in the title bar correctly changes when I navigate between groups. The bug makes it difficult to know which file I have open.
I noticed this problem roughly around build 2112, possibly when I switched from the beta build to the dev build.