Here's an observation which may or may not be relevant. The plane decelerated from horizontal Mach 0.82 to 107 knots over a period of 3 min 30s. By my estimate that is an average horizontal deceleration of around 0.1g.
The aircraft pitched up steeply and decelerated from cruise speed to a virtual standstill in the first 30 seconds or so, then went from about 80 mph up to over 100 mph down. None of that would have been interpreted as normal horizontal flight.