Please add more details about your setup, as asked in https://retropie.org.uk/forum/topic/3/read-this-first.

@meleu: I've added version in my initial post (sorry to have not posted this earlier)

@jdrassa: the scrolling was restarting at the beginning but you point me to the right solution. By disabling Power Saver Modes in EmulationStation option, the scrolling is perfect as before now (goes to the bottom, pause for a sec or 2 then start from the beginning).

Thanks for your help.