I've been experiencing a lot of issues trying to navigate a video mix down by punching in timecode. Won't let you. Eventually, I just figured I'll scroll to the timecode necessary... Eventhough, a timecode shows for these clips.
Now, I tried to do an Autosequence from a mix down in order to export a QT with Timecode burn and I get this error when trying to create the auto sequence: "Exception" CLEAN-NO_TC, clip name: NAME OF CLIP". I think this proves that the Timecode track creation when creating a video mix down isn't working.