UTF-16 characters return incorrectly from StringToBytes/BytesToString conversion

When a UTF-16 character (™ for example) is passed into a StringToBytes() function and then returned via BytesToString, the returned character does not match (in the case of ™, a double quotes is returned instead).

1. Open UE4 Editor
2. Add code to project based on Actor (MyActor)
3. In MyActor::BeginPlay() add the following:

   	FString inString(TEXT("™"));
   	uint32 size = inString.Len();
   	TArray<uint8> data;
   	data.AddUninitialized(size);
   	StringToBytes(inString, data.GetData(), size);
   
   	FString outString = BytesToString(data.GetData(), size);
   
   	GEngine->AddOnScreenDebugMessage(-1, 10.f, FColor::Red, inString);
   	GEngine->AddOnScreenDebugMessage(-1, 10.f, FColor::Green, outString);
   

4. Compile
5. Add instance of class to the level
6. PIE

Result:
™ is printed as the inString and " is printed as the outString

Expected:
™ is returned for both the inString and outString.