I can say I've got effectively the same issue that @flummoxer mentions, I quickly open a new tab, type a search, hit enter and it'll start loading the content, then act as if I've just hit the back button and goes back to the new tab page. If I look at the history though, my search is there still, and I can hit back and it'll be back to where I left off.
Same goes when going from a search to a linked page, sometimes it jumps back to the search and I need to click it again.
It's very odd. I wonder if it's got to do with me primarily using a named tab group/window, which my understanding is it's synced via iCloud to my phone, perhaps somewhere in the sync process it's not too fond of me navigating that fast and returns me to my previous page during the sync?
