Nest EDL

Today I have been looking at nesting EDL, it seems like a wonderful function, but I have found a problem. Let me explain: When I open an .xml project in nested EDL mode, it loads in resources, very well, but if I open this EDL from there to make any changes, all the files of this project are loaded, which is very normal to occur this, so far so good, but when I close the EDL to return to the project, all the files get loaded, and this has puzzled me. I think the correct thing would be that when closing the EDL, only the files of this new project were left in the resources window. Or am I doing something wrong again? I have made a video so that what I quote is better understood. https://streamable.com/nn0lmf