From article:
The investigation into the crash is still ongoing, but flight safety investigators and the senior commander in charge of joint flying operations said last week a combination of a software "bias" and the crew's inability to react to the unexpected moves of the flight control computer likely contributed to the tragedy on April 29.
The lead investigator, Col. John Alexander, said the crash and the software issue were "completely unforeseen."
Sounds like a repeat of the S-97 crash which was the aircraft controls responding in an unexpected manner to a normal input with no recognition time available to adapt to the flight control error. The timeline would indicate that both the 97 and 148 controls were done by the same flight controls team, which points to systemic failures in the development processes used. Does not bode well for CH-53K deployment.