First time it’s happened, and everything finished correctly and just fine, but it was odd, to be sure. Here’s a photo of my actual print job in process;
and here’s what was showing on the preview screen while it was running;
It never did show the entire thing as it was finishing.
And here, it says it ( a different job) is finished when the preview screen shows it partially finished;
As far as the time countdown, I have no idea if it was correct…but the preview screen sure wasn’t.