Exported Video Missing a Part from Pre-Rendered Preview

I exported a video, watched through the final version, and noticed that it was missing the ending section. I thought I may have accidentally moved the sliders that cut off the end, so I redid my project a second time, this time, paying more attention to the settings. However, still the same problem. Here's the video. You'll noticed that the end of the second (exported) video still has a couple of seconds left, but nothing falls down.