Thank you for the feedback.
I assume that you refer to the mobile version of the SplitView demo.
I was able to reproduce the issue with the back button. We will log it and try to fix it as soon as possible. The fix will be most probably published with next service pack or major release.
Regarding the second issue, I did not manage to understand how to reproduce it. Could you please provide a step-by-step instructions? When I press the index button the index page of the app loads as expected. After that I am able to navigate to the SplitView demo which seems to behave as expected.
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