DependencyService does not gets registered if called by xamarin.forms project before registering

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e/5 :clock5:help wantedt/bug :bug:up-for-grabs

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描述

Description

When DependencyService is registered before PLC project calls for the method, it works well. However if it is called before the native project registers the method, Register method in Dependency service never works again

Steps to Reproduce

Please find a sample project in the below link:

https://github.com/rags217/DSTest

click set dependency1 button -> message displayed: dependency1 is set
click call dependency2 button -> message displayed: dependency1 is called
That works fine
now try in the reverse order for second dependency
click call dependency2 button -> message displayed: dependency2 is null
click set dependency1 button -> message displayed: dependency2 is set
click call dependency2 button AGAIN-> message displayed: dependency2 is null

Expected Behavior

in step 7 message should be dependency2 is set

Actual Behavior

in step 7 message should be dependency2 is null

Basic Information

Version with issue: 2.5.0.280555 Last known good version: N/A IDE: Xamarin Studio for Mac Platform Target Frameworks: Android: 8.0 Android Support Library Version: N/A Nuget Packages: Affected Devices: Samsung galaxy, LG variants

Screenshots

Reproduction Link