Navigation drawer half way

I have an application that have a modal page that is showed in landscape mode, the rest of the app is in portrait.
When I close the modal page and return to the landscape the navigation drawer is half way showed (only in android, there is no problem in ios).
The change in the orientation was made using this method: http://stackoverflow.com/questions/32157585/how-to-set-contentpage-orientation-in-xamarin-forms
How can I fix this? Completely show the drawer or not, but not half way. I am already using IsPresented = false; with true of false after returning.
This is how it looks: