I think the only loss of a jettisonable nose was when it was tested, a 'clever' electrician noted a long loop of cable and decided to shorten it, this cable was the connection between the nose and its parachute. End result when the nose was banged off was a big THUD as the nose hit the ground having severed the cable before chute actuation.
I would have been severly worried if any of the 4 BIG bolts that held the nose on the Victor ever came adrift. To lose electrical connections, all 4 must be undone, so rather than lose a few 'vital' connections, the whole nose would have fallen off.
So I think the Wittereing episode is just another Victor illusion.