Perhaps transitioning from Hover during the last task to forward flight the aft Xfer pump was switched off as per RFM (or once the caution was activated due to no flow) but the FWD pump was missed, quite how is unknown.
The A/P could have disconnected for several reasons, excessive attitude, power failure are just two, my money is on power failure due to the Gen dropping off.
I would expect the rotor rpm to fall before the Gen goes off line, N1 spinning at around 90%+.