Modifiing property from INotifyPropertyChanged Class after GoToAsync -> Pop -> GoToAsync result in ObjectDisposedException

[jm-parent]

Hi all !

Like the title said , i need some help about binding Observable model :(
This is what i have :

A model with INotifyPropertyChanged ( i tried before with ObservableObject from MvvmHelper James Montemagno )

3 buttons binded on a command that modify the properties

The commands

What i did :
GotoAsync("ScanWorking") ,
select PowerKm ,
validate ,
await Shell.Current.Navigation.PopAsync();
GotoAsync("ScanWorking") ,
Selected button is still selected , and when i'm try to select another PowerKw , i get this error.

Poping page dispose my data model object , and i dont know how i can handle this ?

Any one have full example with Shell & MvvmLight ?

[jm-parent]

Update:

Same thing with any property :'(

First time on screen , modify value , validate => ok
pop
Go to the screen a second time. Data seems to still be there.
Click to chose another value
Crash 👎