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I have this same issue, and when the hard upshifting occurs, the car won't rev match downshifts. Going into first at about 25 MPH causes the tires to chirp. It seems as though the ECU isn't applying throttle when shifting. Also, when taking off normally in auto, when the car shifts into second at about 2,000 RPM, it feels like there's a drop in torque for a couple seconds, and that's when the problem starts.
Sometimes when I come to a complete stop, the RPMs will dip below 500 then jump up to about 950, although I'm not 100% sure the two are connected.
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