Hi Michael,
I am the director on this shoot. It is indeed dead pixel(s).
We had one when we left the shoot which was brought to our attention by a colorist doing some tests on the first footage from the camera. We black balanced and the dead pixel was masked. We then had three more show up. Black balanced and then gone. Yesterday in the field we had another appear. Did the same and it was masked. So it could be a bad sensor and I’m guessing the camera will need to be sent in.
Peter