Currently, when invoking the 'Generate Sample Data' action, it appears that under certain circumstances, certain Text-based Data Values, whilst successfully randomizing on-Stage, are however not visibly writing their updated Values in the Data Set Properties.

Note that this seems to only occur in the DataGeneration sample, and not in smaller samples (is it choking on the amount of Data to generate perhaps?)

Note that Colours seem to randomize and immediately display as expected, and that this only seems to apply to text-based values (Numbers and Strings)

See attached video.

Repro Steps:

1) Open the MiniShowcases Project from the GitHub InternalSamples.
2) Open the DataGeneration.xaml sample.
3) Navigate to the Data Panel, and select the "DataGeneration_Map_Set" Data Set included within the "DataGeneration_Map_Collection" Data Structure.
4) In the Data Set's Properties, expand the Values, and expand the section titled "Town".

5) Run a Generate Sample Data action.
Observe how although the Mayor's module in the top-right of the screen has successfully randomized and updated, that the Values in the DataSet's Properties have not.

Expected Results: Running a Generate Sample Data action randomizes/updates Data Values in all relevant places.