When Maximizing and Restoring the application's window, the RadSideDrawer's MainContent sometime gets measured wrong. This results in a corrupt state where all the main content is off-screen when the app is in the Restored state.
This can be tricky to reproduce without guidance, therefore I've recorded a video (attached) to demonstrate how to reproduce it as fast as possible with the code below:
<ContentPage ...> <telerikPrimitives:RadSideDrawer DrawerLength="400" AreGesturesEnabled="false" DrawerLocation="Bottom" DrawerTransitionType="SlideInOnTop" DrawerTransitionDuration="0.2" IsOpen="False" VerticalOptions="FillAndExpand"> <telerikPrimitives:RadSideDrawer.DrawerContent> <StackLayout VerticalOptions="FillAndExpand" BackgroundColor="GreenYellow"> <Label Text="DrawerContent" VerticalOptions="FillAndExpand"/> </StackLayout> </telerikPrimitives:RadSideDrawer.DrawerContent> <telerikPrimitives:RadSideDrawer.MainContent> <StackLayout Orientation="Vertical" VerticalOptions="FillAndExpand" BackgroundColor="LightBlue" Margin="0" Padding="10"> <Button Text="Telerik" FontSize="Large" BackgroundColor="Orange" HorizontalOptions="FillAndExpand" /> </StackLayout> </telerikPrimitives:RadSideDrawer.MainContent> </telerikPrimitives:RadSideDrawer></ContentPage>