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In some scenarios (it's consistently reproducible, but not exactly the same way every time), a Xamarin.Forms app using the Xuni FlexChart is drawing out of it's expected bounds, on top of other system UI elements (e.g. Status bar). I will attach a reproduction of the issue, but a Test Cloud run displaying the behavior can be found here:
In this case, the problem manifests itself with there are 3 pages, each held inside a Tabbed Page. On each page, there is an identical chart. The UITest project (as well as the XTC Test Results) show the steps to reproduce, but they are:
1. Launch the app, and slowly scroll to the bottom of the first page.
2. Navigate to the second page, and redo step 1
3. Repeat for page 3
Note: this doesn't happen exactly the same every time. Sometimes I see it locally, other times it works fine. You'll see in the test results that many devices don't show the issue at all. As I've tested, it doesn't happen exactly the same way every time (i.e. it's not exactly the same device/os with exactly the same steps every time - it varies when, and on which device it appears), but it does happen consistently.