Apparently this code just never got pushed to the repository whenever I wrote it, and I don't really remember what it's supposed to do differently from before.

Source/CommonLoadingScreen/Private/LoadingScreenManager.cpp

@@ -146,7 +146,7 @@ bool ULoadingScreenManager::ShouldCreateSubsystem(UObject *Outer) const
 	return !bIsServerWorld;
 }
 
-class ULoadingScreenWidget *ULoadingScreenManager::ShowLoadingScreen()
+ULoadingScreenWidget *ULoadingScreenManager::ShowLoadingScreen()
 {
 	if (this->bCurrentlyShowingLoadingScreen)
 	{
@@ -202,6 +202,22 @@ class ULoadingScreenWidget *ULoadingScreenManager::ShowLoadingScreen()
 }
 
 void ULoadingScreenManager::HideLoadingScreen()
+{
+	const float HoldTime = GetDefault<UCommonLoadingScreenSettings>()->HoldLoadingScreenAdditionalSecs;
+	if (FMath::IsNearlyZero(HoldTime))
+	{
+		this->HideLoadingScreen_Private();
+	}
+	else
+	{
+		this->GetWorld()->GetTimerManager().SetTimer(
+			this->HideLoadingScreenTimerHandle,
+			this, &ULoadingScreenManager::HideLoadingScreen_Private,
+			HoldTime
+		);
+	}
+}
+void ULoadingScreenManager::HideLoadingScreen_Private()
 {
 	if (this->bCurrentlyShowingLoadingScreen)
 	{

Source/CommonLoadingScreen/Public/LoadingScreenManager.h

@@ -46,6 +46,9 @@ public:
 	FORCEINLINE FOnLoadingScreenVisibilityChangedDelegate &OnLoadingScreenVisibilityChangedDelegate() { return LoadingScreenVisibilityChanged; }
 	
 private:
+	/** Actually hides the loading screen, either immediately or after a delay if necessary. */
+	void HideLoadingScreen_Private();
+
 	/** Removes the loading screen. The loading screen widget will be destroyed. */
 	void RemoveLoadingScreen();
 
@@ -90,4 +93,7 @@ private:
 
 	/** True when the loading screen is currently being shown */
 	bool bCurrentlyShowingLoadingScreen = false;
+
+	/** Handle for the timer that controls how much extra time to wait before fading the loading screen away */
+	FTimerHandle HideLoadingScreenTimerHandle;
 };