Histogram of TrackObjects displacements shows only zeros

I’ve performed tracking of nuclei across a few frames, exported the data as .h5, and then loaded in so that I can make some data plots. In particular I’d like to make a histogram of X displacements between frames. So I use [Data Tools]->[DisplayHistogram]. For many data items it works just fine, but for TrajectoryX I just get a histogram of zero values:

If I use HDFView I can see that there are non-zero values in this data array (and I know that the cells moved). I’m guessing that it is only looking at the data for the first time point (which are all zeros). Is there a way to see all of the data, or, better, data for a specific set of frames?