The X2 get´s now the 2nd Salas shunt regulator for the 3.3V line.
Therefore the onboard 3.3V reg. and the 100µF cap on it´s output is canceled.

Jesus Christ......What an improvement!
That kicks me out of my chair

My recommendation:
Never, and i mean never, let the X2 play with the onboard voltage regulators,
especially the 3.3V one!