I can export the first time, no problems. If I make a change in the timeline (doesn't matter the change), re-export replacing the previous export file (stepping over the old file), the export seems successful but Premiere hangs on Droverlord.exe then fully crashes without saving and thus losing all changes since last save.
Thank you for your input. However, your advice is a little like telling a doctor your arm hurts when you move it up and the doctor responding, "Don't move your arm up." In delivering broadcast commercials, my file names are specific ISCI identifiers which have accompaning traffic instructions which reference the file name specifically.
I should've been a little more specific with the description of my issue. a) I've been able to do this in previous versions of Premiere b) I'm currently able to do this with other file formats (i.e. mp4) just specifically unable to do this in MXF only c) After Effects is able to step over files without issue.
It seems to be specificaly a Premiere Pro / MXF issue. I was hoping to get more technical insight as to why this is happening, especially since it used to work and still works with other file formats.