diff --git a/CHANGELOG.md b/CHANGELOG.md
index 66db458b5..c1fbd97ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Breaking Changes
+
+- Rename public `OnError` delegate field in `FSentryOutputDeviceError` class to `OnAssert`
+
 ### Features
 
 - On Windows/Linux the SDK can now automatically attach a screenshot to crash events([#582](https://github.com/getsentry/sentry-unreal/pull/582))
@@ -10,6 +14,7 @@
 ### Fixes
 
 - The SDK no longer intercepts assertions when using crash-reporter ([#586](https://github.com/getsentry/sentry-unreal/pull/586))
+- Fix calling `beforeSend` handler during post-loading ([#589](https://github.com/getsentry/sentry-unreal/pull/589))
 - Fix crash when re-initializing Sentry ([#594](https://github.com/getsentry/sentry-unreal/pull/594))
 
 ### Dependencies
diff --git a/plugin-dev/Source/Sentry/Private/Desktop/SentrySubsystemDesktop.cpp b/plugin-dev/Source/Sentry/Private/Desktop/SentrySubsystemDesktop.cpp
index dfbb6dc92..dcf835555 100644
--- a/plugin-dev/Source/Sentry/Private/Desktop/SentrySubsystemDesktop.cpp
+++ b/plugin-dev/Source/Sentry/Private/Desktop/SentrySubsystemDesktop.cpp
@@ -37,6 +37,7 @@
 #include "GenericPlatform/GenericPlatformOutputDevices.h"
 #include "GenericPlatform/GenericPlatformCrashContext.h"
 #include "UObject/GarbageCollection.h"
+#include "UObject/UObjectThreadContext.h"
 
 #if PLATFORM_WINDOWS
 #include "Windows/WindowsPlatformMisc.h"
@@ -81,9 +82,14 @@ sentry_value_t HandleBeforeSend(sentry_value_t event, void *hint, void *closure)
 	USentryEvent* EventToProcess = NewObject<USentryEvent>();
 	EventToProcess->InitWithNativeImpl(eventDesktop);
 
-	return SentrySubsystem->GetBeforeSendHandler()->HandleBeforeSend(EventToProcess, nullptr)
-		? event
-		: sentry_value_new_null();
+	USentryEvent* ProcessedEvent = EventToProcess;
+	if(!FUObjectThreadContext::Get().IsRoutingPostLoad)
+	{
+		// Executing UFUNCTION is allowed only when not post-loading
+		ProcessedEvent = SentrySubsystem->GetBeforeSendHandler()->HandleBeforeSend(EventToProcess, nullptr);
+	}
+
+	return ProcessedEvent ? event : sentry_value_new_null();
 }
 
 sentry_value_t HandleBeforeCrash(const sentry_ucontext_t *uctx, sentry_value_t event, void *closure)
@@ -102,9 +108,14 @@ sentry_value_t HandleBeforeCrash(const sentry_ucontext_t *uctx, sentry_value_t e
 		USentryEvent* EventToProcess = NewObject<USentryEvent>();
 		EventToProcess->InitWithNativeImpl(eventDesktop);
 
-		return SentrySubsystem->GetBeforeSendHandler()->HandleBeforeSend(EventToProcess, nullptr)
-			? event
-			: sentry_value_new_null();
+		USentryEvent* ProcessedEvent = EventToProcess;
+		if(!FUObjectThreadContext::Get().IsRoutingPostLoad)
+		{
+			// Executing UFUNCTION is allowed only when not post-loading
+			ProcessedEvent = SentrySubsystem->GetBeforeSendHandler()->HandleBeforeSend(EventToProcess, nullptr);
+		}
+
+		return ProcessedEvent ? event : sentry_value_new_null();
 	}
 	else
 	{
diff --git a/plugin-dev/Source/Sentry/Private/SentryOutputDeviceError.cpp b/plugin-dev/Source/Sentry/Private/SentryOutputDeviceError.cpp
index 8f2493c06..a1e1172af 100644
--- a/plugin-dev/Source/Sentry/Private/SentryOutputDeviceError.cpp
+++ b/plugin-dev/Source/Sentry/Private/SentryOutputDeviceError.cpp
@@ -13,7 +13,7 @@ void FSentryOutputDeviceError::Serialize(const TCHAR* V, ELogVerbosity::Type Ver
 {
 	if(FDebug::HasAsserted())
 	{
-		OnError.Broadcast(V);
+		OnAssert.Broadcast(V);
 	}
 
 	if (!ParentDevice)
diff --git a/plugin-dev/Source/Sentry/Private/SentrySubsystem.cpp b/plugin-dev/Source/Sentry/Private/SentrySubsystem.cpp
index 3b1aa493c..42af22f6c 100644
--- a/plugin-dev/Source/Sentry/Private/SentrySubsystem.cpp
+++ b/plugin-dev/Source/Sentry/Private/SentrySubsystem.cpp
@@ -170,7 +170,7 @@ void USentrySubsystem::Close()
 	{
 		if(OnAssertDelegate.IsValid())
 		{
-			OutputDeviceError->OnError.Remove(OnAssertDelegate);
+			OutputDeviceError->OnAssert.Remove(OnAssertDelegate);
 			OnAssertDelegate.Reset();
 		}
 
@@ -665,7 +665,8 @@ void USentrySubsystem::ConfigureOutputDeviceError()
 	OutputDeviceError = MakeShareable(new FSentryOutputDeviceError(GError));
 	if (OutputDeviceError)
 	{
-		OnAssertDelegate = OutputDeviceError->OnError.AddLambda([this](const FString& Message)
+		OnAssertDelegate = OutputDeviceError->OnAssert.AddLambda([this](const FString& Message)
+
 		{
 			SubsystemNativeImpl->CaptureAssertion(TEXT("Assertion failed"), Message);
 
diff --git a/plugin-dev/Source/Sentry/Public/SentryOutputDeviceError.h b/plugin-dev/Source/Sentry/Public/SentryOutputDeviceError.h
index d6def2264..8b569ef1f 100644
--- a/plugin-dev/Source/Sentry/Public/SentryOutputDeviceError.h
+++ b/plugin-dev/Source/Sentry/Public/SentryOutputDeviceError.h
@@ -15,7 +15,7 @@ class FSentryOutputDeviceError : public FOutputDeviceError
 
 	FOutputDeviceError* GetParentDevice();
 
-	TMulticastDelegate<void(const FString&)> OnError;
+	TMulticastDelegate<void(const FString&), FDefaultTSDelegateUserPolicy> OnAssert;
 
 private:
 	FOutputDeviceError* ParentDevice;