Over and Above the default template? Because the code is matching now line by line. I also have had some attached components without that problem. What specifically are you attaching?
Edit Yeah, I just confirmed it, attached objects behave correctly currently. So the only thing that should be causing issues for you is if you are attaching something that is losing its scene rendering object and being re-created ( kills late updates for the frame it is being re-made) or if you are on a very old build right after I was porting some of the changes Epic made over.