Note: The controlinputs showed correctly on the ECAM at first...
I had a tour with that CPT a couple of weeks later, and he told me, that they did the Flight Control Check acc SOP on the ground. The tricky part was this: At first, the control inputs showed correctly on the ground!!
Then they had their flight with the little adrenalin-kick upon TO..
After they landed, they checked the flight controls of the left Stick again..
The first 1 or 2 sec correct display, and then the amazing thing happened: They flickered a little and then swung over to the wrong side!
At a certain point checking, double checking and so on reach a level, where it isnīt practicable anymore. This was just too hidden and tricky.
This was the point, where pilots did the job, they are so well paid for..