Make sure you aren’t running anything else while digitizing. On one of my systems, I can’t log, batch dig and then cruise the Cow…the other system can’t handle it.
If that isn’t the problem, couple of options – try control track. Or black another tape, lay the footage to that tape…then you know you have a pristine time code.
If you are using a tape that’s been used a few times, TC can get a little wierd.