Problems with Picker in iOS

Hi all

In my project (based on template “Blank App (Xamarin.forms Shared)” I have a page with Pickers.
Installed version of Xamarin.Forms: 1.2.2.6243.

In iOS, the Picker is showed correct, but if the user select the first entry and click “Done”, the first entry is not selected.
To select the first entry, the user has to change first to another entry (e.g. the second) and then change back to the first entry.
In Android and WP the selection of the first entry works…

Is this known bug or do I miss something…?

In Android the text to the Picker is displayed automatically in the correct “Device-Language” (in my case this is German = "Abbrechen" and "OK").

In iOS the text (“Done”) is displayed in English (although the “Device-Language” is German.

Is this known bug or do I miss something…?

Thanks