Quips aside, as far as was published* the AFCS was in "altitude hold" mode and disengaged
after aircraft movement due to turbulence caused its control inputs to exceed limits and it subsequently reverted to a manual stabilization mode.
This is not considered to be the cause of the mishap, rather something that may have developed during the event and contributed to the outcome. I assume this is an early result of accessing the FDR data that was found salvageable (while the CVR apparently is not).
*: Thomas Wiegold published a German language article on the Airbus ASB issued after the crash
on his blog