There have been a few times I’ve come to my computer, seen DERAILED on the page, freaked a little, hit refresh, and phew, I’m good.
I haven’t dug into the web page source to see if there’s any sort of ajaxy stuff going on, but if it there is, maybe schedule an update right before transitioning to DERAILED?
Same thing happened to me today for the first time. It really kind of freaked me out too because I knew I shouldn’t have derailed, but couldn’t remember entering my data.