If there is a vulnerability in the Flight Control System the proximity to the mobile RadHaz that is a warship could have been a trigger.
Not impossible given the relatively low number of fleet hours for the type, but I'd assume this to be a pretty low percentage based on the similarity to the FCS of the baseline S92, as well as the lessons learned from the extensive EMI/RFI testing/hardening done for the VH variant.
Is this just a spitball or do you have a data point in mind?