diff --git a/.github/workflows/test-run-android.yml b/.github/workflows/test-run-android.yml
index 6400e761d..8d90dc546 100644
--- a/.github/workflows/test-run-android.yml
+++ b/.github/workflows/test-run-android.yml
@@ -32,6 +32,7 @@ jobs:
       HOMEBREW_NO_INSTALL_CLEANUP: 1
       SENTRY_DSN: ${{ secrets.SENTRY_TEST_DSN }}
       SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
+      SENTRY_TEST_UNITY_VERSION: ${{ inputs.unity-version }}
 
     steps:
       - name: Checkout
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 252fc315b..738ea3049 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## Unreleased
+
+### Fixes
+
+- The SDK no longer throws a `NullReferenceException` during startup on Android and iOS when it can't load its options, for example when the configuration lives in an OBB file that isn't available yet. ([#2931](https://github.com/getsentry/sentry-unity/pull/2931))
+
 ## 4.12.0
 
 ### Behavioral Changes
diff --git a/src/Sentry.Unity.Android/SentryNativeAndroid.cs b/src/Sentry.Unity.Android/SentryNativeAndroid.cs
index 082be4ab3..b77d081ee 100644
--- a/src/Sentry.Unity.Android/SentryNativeAndroid.cs
+++ b/src/Sentry.Unity.Android/SentryNativeAndroid.cs
@@ -224,11 +224,21 @@ void Refresh()
     /// <summary>
     /// Closes the native Android support.
     /// </summary>
-    public static void Close(SentryUnityOptions options)
+    public static void Close(SentryUnityOptions? options) =>
+        Close(options, ApplicationAdapter.Instance.Platform);
+
+    // For testing
+    internal static void Close(SentryUnityOptions? options, RuntimePlatform platform)
     {
         Logger?.LogInfo("Attempting to close the Android SDK");
 
-        if (!options.IsNativeSupportEnabled())
+        if (options is null)
+        {
+            Logger?.LogDebug("No options available. Skipping closing the Android SDK");
+            return;
+        }
+
+        if (!options.IsNativeSupportEnabled(platform))
         {
             Logger?.LogDebug("Android Native Support is not enabled. Skipping closing the Android SDK");
             return;
diff --git a/src/Sentry.Unity.MacOS/SentryNativeMacos.cs b/src/Sentry.Unity.MacOS/SentryNativeMacos.cs
index 8e8d3071a..ac11148b7 100644
--- a/src/Sentry.Unity.MacOS/SentryNativeMacos.cs
+++ b/src/Sentry.Unity.MacOS/SentryNativeMacos.cs
@@ -26,7 +26,7 @@ public static void Configure(SentryUnityOptions options)
         SentryNativeCocoa.Configure(options);
     }
 
-    public static void Close(SentryUnityOptions options)
+    public static void Close(SentryUnityOptions? options)
     {
         if (options is null)
         {
diff --git a/src/Sentry.Unity.iOS/SentryNativeCocoa.cs b/src/Sentry.Unity.iOS/SentryNativeCocoa.cs
index ea913e04d..4e3bb8f9c 100644
--- a/src/Sentry.Unity.iOS/SentryNativeCocoa.cs
+++ b/src/Sentry.Unity.iOS/SentryNativeCocoa.cs
@@ -132,11 +132,21 @@ internal static void Configure(SentryUnityOptions options, RuntimePlatform platf
     /// <summary>
     /// Closes the native Cocoa support.
     /// </summary>
-    public static void Close(SentryUnityOptions options)
+    public static void Close(SentryUnityOptions? options) =>
+        Close(options, ApplicationAdapter.Instance.Platform);
+
+    // For testing
+    internal static void Close(SentryUnityOptions? options, RuntimePlatform platform)
     {
         Logger?.LogInfo("Attempting to close the Cocoa SDK");
 
-        if (!options.IsNativeSupportEnabled())
+        if (options is null)
+        {
+            Logger?.LogDebug("No options available. Skipping closing the Cocoa SDK");
+            return;
+        }
+
+        if (!options.IsNativeSupportEnabled(platform))
         {
             Logger?.LogDebug("Cocoa Native Support is not enable. Skipping closing the Cocoa SDK");
             return;
diff --git a/test/IntegrationTest/Integration.Tests.ps1 b/test/IntegrationTest/Integration.Tests.ps1
index 6e9f39c20..9f39a191d 100644
--- a/test/IntegrationTest/Integration.Tests.ps1
+++ b/test/IntegrationTest/Integration.Tests.ps1
@@ -447,6 +447,10 @@ Describe "Unity $($env:SENTRY_TEST_PLATFORM) Integration Tests" {
                 Set-ItResult -Skipped -Because "line numbers come from the IL2CPP mappings, which a Mono player does not produce"
                 return
             }
+            if ($script:Platform -eq "Android" -and $script:TestSetup.UnityVersion -like "2021.3*") {
+                Set-ItResult -Skipped -Because "on the Android 2021.3 x86_64 emulator, IL2CPP intermittently reports no stack frames for the thrown exception, so the event carries only the throwing frame without a native address"
+                return
+            }
 
             $frame = $runEvent.exception.values[0].stacktrace.frames |
                 Where-Object { $_.module -eq "IntegrationTester" -and $_.function -eq "ThrowException" } |
diff --git a/test/Sentry.Unity.Android.Tests/SentryNativeAndroidTests.cs b/test/Sentry.Unity.Android.Tests/SentryNativeAndroidTests.cs
index 73ca5e915..0634514d7 100644
--- a/test/Sentry.Unity.Android.Tests/SentryNativeAndroidTests.cs
+++ b/test/Sentry.Unity.Android.Tests/SentryNativeAndroidTests.cs
@@ -4,6 +4,7 @@
 using NUnit.Framework;
 using Sentry.Unity.Tests.SharedClasses;
 using Sentry.Unity.Tests.Stubs;
+using UnityEngine;
 
 namespace Sentry.Unity.Android.Tests;
 
@@ -36,6 +37,15 @@ public void TearDown() =>
             Interlocked.Exchange(ref SentryNative.ReinstallSentryNativeBackendStrategy!,
                 _originalReinstallSentryNativeBackendStrategy)!;
 
+    [Test]
+    public void Close_OptionsNull_DoesNotCloseSentryJava()
+    {
+        _testSentryJava.SentryPresent = true;
+
+        Assert.DoesNotThrow(() => SentryNativeAndroid.Close(null, RuntimePlatform.Android));
+        Assert.False(_testSentryJava.CloseCalled);
+    }
+
     [Test]
     public void Configure_DefaultConfiguration_SetsScopeObserver()
     {
diff --git a/test/Sentry.Unity.iOS.Tests/SentryNativeIosTests.cs b/test/Sentry.Unity.iOS.Tests/SentryNativeIosTests.cs
index eac8b89de..0e15269bd 100644
--- a/test/Sentry.Unity.iOS.Tests/SentryNativeIosTests.cs
+++ b/test/Sentry.Unity.iOS.Tests/SentryNativeIosTests.cs
@@ -7,6 +7,12 @@ namespace Sentry.Unity.iOS.Tests;
 
 public class SentryNativeCocoaTests
 {
+    [Test]
+    public void Close_OptionsNull_DoesNotThrow()
+    {
+        Assert.DoesNotThrow(() => SentryNativeCocoa.Close(null, RuntimePlatform.IPhonePlayer));
+    }
+
     [Test]
     public void Configure_DefaultConfiguration_iOS()
     {