this post gave me trouble, I edited it, tapped the +2 for editing after page refreshing (I do that too much), played around putting my mobile browser into desktop site mode (another thing I do too much of). It reloaded to the page not found warning. Getting out of Desktop mode, didn't fix it. I could still find the post through tags I remembered though (ruling out deletion). I think between this anomaly, and the other post edit mishaps, someone needs to trace ( Settings in Chrome) the issue. It may be in code that gets initiated to signal editting changes. I can't unless I'm on a library computer, or get a gzip app, because the file given back is gzip format from the trace.