[UWP] Last element in grid is rendered with lowest Z-Index

[activa]

Description

PR #2762 breaks rendering of Grid elements. The last element in a grid is rendered with the lowest Z-Index and disappears under all other elements. The last element should have the highest Z-index

This is only broken on UWP. Works fine on Android and iOS

Steps to Reproduce

1. Add 2 overlapping UI elements to a grid

Expected Behavior

The last UI element is rendered on top of the first

Actual Behavior

The first UI element is rendered on top of the second

Basic Information

• Version with issue: 3.0.0.5308
• Last known good version: 3.0.0.4825
• Affected Devices: UWP

Screenshots

Reproduction Link

UWPGridZBug.zip

[activa]

Can this please get the attention and priority it deserves? This regression bug completely breaks the majority of UWP apps that were built with Xamarin Forms. I would go as far as to suggest pulling both versions 3.0.0.530938 and 3.0.0.550146 from the Nuget repository.