Time code problem when round-tripping with Ppro

When sending a clip from Ppro to Audition for repair work the reference file always comes back as Non-Drop Frame TC, which is strange since I'm always working in Drop Frame. In order to get the TC to match properly I have to go into modify clip properties and manually set the TC back to Drop. Is there some preference setting in either Audition or Ppro that will get it to send back the same type of TC I started with? This is an amazingly annoying PITA in what is otherwise a wonderful feature of Ppro.

By the way I'm working with the latest release of PPro and Audition, on a Mac Pro and cutting ProRes 1080P30.