All that I can theorise is the possibility of intermittent drive though the left CV that caused the centre diff to engage each time drive was momentarily lost throughout the long drive out that caused excessive jarring of both the right CV and the TC.

IIRC is was Gordon (GGHAGGIS) who made the comment about the TC diff actuator design being weaker then the rear e-diff's actuator. Of note is that the TC actuator motor does double duty as the range change motor and that may be a crucial factor.