I tried to search the forum before posting but didn't see anything similar right away, and with over 1000 results, I didn't feel like going through every one.
This isn't a big deal, when I get this I can just reload the page and get it back but my situation is different than the others I've searched.
I'll have a page that is fully loaded, done, all set. Then, some time later, minutes, sometime hours, all of the sudden I'll go back the a tab and the page is gone and there will be a page with that error "the connection was reset".
If this happened while loading, I'd understand, but why would this happen long after the page was loaded?