Ok, here are some screen grabs showing the issue. The first image shows that it's just stopped sampling at 200,000 points, even though this is far short of the 10,000 seconds I told it to capture. The second graph shows the settings that I used.
Note that it says "Acquiring (100%)" although this does not show up on the screen capture. It was set to capture 10,000 seconds but to continue until manually stopped. It says it has captured 200,000 pts, and if you divide 10,000 seconds by the Sample Interval value it's automatically selected, 0.05s, this gives 200,000. I suspect the issue likes somewhere with the sample interval it chose. Perhaps it chose a number of sample points up front, but then used a different sample interval and so ended up finishing early. Still, it was told to continue until manually stopped, so it shouldn't have stopped...