LockRecursionException During LdClient.Init() on Xamarin Android (SDK 4.0.0)

[neerajgroverflynn]

Calling LdClient.Init() in a Xamarin Android project using LaunchDarkly SDK version 4.0.0 consistently throws a System.Threading.LockRecursionException, even when following all recommended practices.

🔧 Environment
Platform: Xamarin Android
SDK Version: LaunchDarkly SDK 4.0.0
Device: Pixel 6, Android 13 (also reproducible on other devices)
Threading Context: Initialization is done on a background thread with TimeSpan.Zero.
💥 Error Message
System.Threading.LockRecursionException: Recursive write lock acquisitions not allowed in this mode.
at System.Threading.ReaderWriterLockSlim.TryEnterWriteLockCore...
at LaunchDarkly.Sdk.Client.Internal.LockUtils.WithWriteLock[T]...
at LaunchDarkly.Sdk.Client.LdClient..ctor...
at LaunchDarkly.Sdk.Client.LdClient.Init...
🧪 What I’ve Tried
Using TimeSpan.Zero for non-blocking initialization.
Ensuring LdClient.Init() is called only once.
Avoiding any external locks or shared state during initialization.
Delaying initialization using Task.Delay() to avoid SDK internal conflicts.
Running initialization on a background thread.
Ensuring the Context object is immutable and not reused.

Sample Code:

C#
public static void Init(Context LDContext)
{
Task.Run(async () =>
{
await Task.Delay(1000); // Delay to avoid SDK internal conflicts

    var config = Configuration.Builder(ConstantsData.LDMobileKey,
        ConfigurationBuilder.AutoEnvAttributes.Disabled).Build();

    var timeSpan = TimeSpan.Zero;

    ldClient = LdClient.Init(config, LDContext, timeSpan);
});

}

[tanderson-ld]

Thank you for opening this issue.

Would you be able to try this same call with TimeSpan.Zero on the hello dotnet client example app to help eliminate any other interactions from your application? This commit uses SDK 4.0.0 and the Readme has instructions.

Do you see the issue if you use a max wait time such as 5 seconds?

Could you provide a stack trace without redactions of line content.

Thank you.