revert inadvertent reversion

Source/StudyFrameworkPlugin/Private/SFGameInstance.cpp

@@ -50,7 +50,7 @@ void USFGameInstance::Init()
 	}
 
 	// Register delegate for ticker callback
-	TickDelegateHandle = FTicker::GetCoreTicker().AddTicker(FTickerDelegate::CreateUObject(this, &USFGameInstance::LogTick));
+	TickDelegateHandle = FTSTicker::GetCoreTicker().AddTicker(FTickerDelegate::CreateUObject(this, &USFGameInstance::LogTick));
 	LogObject->Initialize();
 
 	bStudyStarted = false;
@@ -73,7 +73,9 @@ void USFGameInstance::Shutdown()
 	}
 	Instance = nullptr;
 	// Unregister ticker delegate
-	FTicker::GetCoreTicker().RemoveTicker(TickDelegateHandle);
+	FTSTicker::GetCoreTicker().RemoveTicker(TickDelegateHandle);
+
+	Super::Shutdown();
 }
 
 void USFGameInstance::OnWorldStart()