[Bug] SwipeView items conflict with Shell menu swipe in from left, on real iOS devices

[1iveowl]

Description

Combining Shell with SwipeView items works in iOS Simulator, but not on a real iOS device.

Specifically, swipe right on a SwipeItem seems to conflict with swiping the Shell menu in from the left.

Steps to Reproduce

Please see the link to the repro below.

On the page with the issue, try swiping from left to right very slowly. This should exhibit the expected behavior of activating the swiping of the SwipeView.

Now try to do the swipe motion more quickly, and see the Shell menu will be pulling in from the left instead, even if the swiping takes place from a horizontal center of the screen.

The issue only appears on real devices, and not in the iOS simulator.

Expected Behavior

On Android there is no observed issues. On android Shell menu swipe in from the left and right swipting SwipeView items does not conflict.

Basic Information

• Version with issue: 4.4.0.991265
• Last known good version: N/A
• IDE: VS 16.4.2, .NET Core runtime 3.1.0
• Platform Target Frameworks:
  • iOS: MDK 6.6.0.155, Xamarin.iOS 13.8.3.0, Xcode 11.3(15712)
• Nuget Packages: Xamarin.Forms 4.4.0.991265, Xamarin.Essentials 1.3.1
• Affected Devices: iOS devices, but not the iOS Simulator

Reproduction Link

https://github.com/1iveowl/Xamarin.Forms/blob/fix-9088/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue9088.cs