@zing Thanks for the answer,
I will try this as the problem is really annoying. I never had this problem before the 7.2.1... And i use recalbox since 4.3.
I need this to work instantly for both my Pi3 ( using standard USB Snes controller, and Dragonrise Arcade sticks.... ) to be able to map the Analog on HAt... It works when i do it.. but once save, and reboot, it is not working anymore, and i have to remap again and again.