Hi JL
Let me to tell you my ECAM CP behaviour more precisely, hoping it will help.
When it starts works normally in Auto mode. I can press any button, but after that I must press the same button again, in order to enter to Auto mode again. So, I should press like this order: FUEL-FUEL-ENG-ENG-ELEC-ELEC... etc. I shouln't press like this order: FUEL-ENG-ELEC... because it sticks to the first one, in this case in FUEL.
Regards