I've seen that problem in chrome before with images; I was trying to read a massive flowchart; the part I was interested in was on the top, and I was busy trac

I've seen that problem in chrome before with images; I was trying to read a massive flowchart; the part I was interested in was on the top, and I was busy tracing it with my finger and getting what I needed, when the entire image vanished and was replaced with a placeholder because it timed out while downloading. This is not just a problem with HTML renderers; JPEG renderers do it too.