Thanks for the feedback.
First: "sometimes" when open the device the menu go to default!
After upgrading to the new firmware, your settings was reset so your Preen boot to "default" default page untill your set it again to an other value.
That's the case when the new firmware has a new settings.
Second: i have normal screen and when i select the OLED screensaver the PreenFM stuck!
I need more information.
LCD or OLED, the behaviour is exactly the same. It's scalled "OLED screensaver" because you don't need a screensaver with a LCD.
So what happens exactly ?
The PreenFM Freeze ? or is it only in screen saver mode ?
Screen saver mode: the screen is cleared until you press a key or turn an encoder.