Tape slack, tape is not securing on the drum/heads.
Eject tape. Turn off deck. Turn hub wheel on cassette to snug up the slack. Power on deck and try again, maybe re-pack the tape; Fastforward to the end and rewind to the beginning, then try to capture again.
I have seen where Premiere has had render issues with ProRes Codec. The one I remember was with Alpha Channel but still, So, I thought it maybe a good idea to try for you.
Again, Use Media Encoder to create the DVD files and not encore.
What I would try is to create a new master out of the FCP sequence using a different codec., Then drop the file into AME and create your BD compliant files.