Modern websites use Content Delivery Networks. Sometimes, a corrupted cache manifest forces the browser to pre-fetch a "null object." 8.58MB is exactly the size of a standard WebAssembly memory page x 107. It might be a harmless, invisible asset that your browser fails to render. A digital hiccup.
Until we find the file, I’ll be keeping my task manager open. And if you hear a faint ding at 2:00 AM… Download-8.58MB-
The Ghost in the Download: What is “Download-8.58MB” and Why is it Watching You? Modern websites use Content Delivery Networks