Thank you for the provided details.
Regarding to the nullreference exception we have a bug report logged in our feedback portal:
The issue was reproduced with ListView, SlideView, SideDrawer and DataGrid controls. I have noticed from the crash you have provided - the exception is for the listview control.
We have added an update in the feedback item regarding this crash. I have pasted the update info in this forum thread:
The issue is confirmed to be in Xamarin.Forms framework. A fix is already provided. The Xamarin.Forms 4.3 version will contain the fix.
Could you please update the Xamarin.Forms version to 4.3 or higher and check whether this solves the issue.
Give the suggestion a try and let me know how it goes.
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