Hey guga,
Yep in “normal” mode they di even if the Pad 2 is a bit capricious for finger roll 
I did reinstall the firmware and nothing will do.
I have contacted Elektron support and I am waiting for an answer.
I just spoke to the nice guy that sold it to me and he said that the Rytm is just coming back from Elektron;s repair center where it’s been 3 weeks already for the same thing!!!
They told him it was fixed but it’s easy to see that it’s not 
Anyway thanks again for input guys, this one is a head cracker since I can’t figure out if it is software or hardware related.