Have a look at Airbus FCB024-AIRCRAFT HANDLING IN FINAL APPROACH.
Regarding full sidestick deflections, Mr. Airbus says therein:
The sidestick's ergonomical design is such that the stop at full deflection is easily reached. This may give the pilot the impression that the aircraft is limited in roll authority, because there is a time delay before the pilot feels the result of his/her action. On conventional aircraft, due to the control wheel inertia, the pilot needs considerably more time to reach the flight control stop.
So I guess bumping the stops is bound to happen from time to time by design...