I have used the Desktop trace tool for years and not had a problem. I recently switched to Pro and now when I trace a polyon, about halfway through tracing, the trace flips and undoes what I just traced and fills in the portion that I have not yet traced. So when I get back to the start, it undoes what I have traced and I have no polygon at all. It must be a setting, but I cant figure out which one. Here is a link to a Dropbox you can see a screen recording.
Help!
Thank you,
