Currently in ArcGIS for Desktop, when your data has more than 10,000 records you receive the following error message letting you know that not all of your data is being displayed.
There is no such warning in ArcGIS Pro. I could not figure out why Pro was not displaying my data like it was in Desktop. I foolishly assumed that Pro did not have the 10,000 maximum sample size limit. Please either increase the maximum limit, or at the very least provide a warning letting us know that not all of our data is being shown.