I do not know if this is recent behavior or not, but this morning I noticed that 10 newly-inserted audio tracks in a project are having their Output set to the project's Guitar Lead bus, rather than to the expected setting to the Master bus. (This project has multiple buses - keyboards, strings, guitars, drums, etc.)
I grabbed a screen shot to show one of the tracks this happened to, the Keyboard Stem, and I have the first few buses shown as well. I thought perhaps it picked the Guitar Lead bus because it was the 1st bus I had added to the project, but it turns out that the Guitar Lead bus is the 2nd bus I had added to the project, so I have no guess as to what might trigger the unexpected Output setting. (The 1st bus I had inserted into the project was the Guitar bus, not the Guitar Lead bus.)
I easily corrected the Output settings, for the 10 tracks I had inserted. I am just pointing out the behavior, so folks can correct the settings, if needed on their projects.
Bob Bone