One more problem there...

When the phone is switch on and the alarm is ringing, I can't acces to the alarm screen and stop it because the phone stays on the wallpaper lockscreen. The only way to stop the alarm is to hold on the power button and reboot the phone...

And when the phone is switched off, I have to put my pin code before the alarm screen appear...

Wow !!!

The problem disapear as soon as I uninstall the system UI extensions...

I'm going to re-install V8.5, because alarm is a very important feature for me.