I don;t know if I am convinced of your analysis yet, but maybe. Not about it happening, but about the why. If you want to be scientific, lift C55 and see if the effect goes away. SHorting the output does put 22 ohms to ground on the IC output, and that could do things to the power rails. Scope them while it happens. ALso within the chip, since the recovery stage is the other half of it, there could also be effects we wouldn't predict.