The 787 has six Generators not three, but hey, you know what you are talking about !
I am noting that you have NFI. 787 GPS NAV can be & is set to off in areas of known spoofing. It then operates independently of GNSS (IRS with radio updates), but whatever you reckon.
When I flew Airbii, I recall the 330 had a wonderful feature that disabled its flaps once retracted inflight, if a monthly inspection had been overlooked. Requiring a flapless landing. Was that because it was programmed for redundancy in different languages by different teams?
Back on topic, it will be interesting to see what caused this event.
The A330 has also had repeated incidents of losing all GPS nav for the remainder of the flight after the GPS gets jammed. Happened to me departing out of TLV. No GPS for next 12 hours.