Clear On Demand Data present in Visualizations when the marking limit exceeded

I have a report that uses an on demand data table that is based on the elements marked in a visualization.  The on demand is limited to returning data for up to 52 elements (Number of identifiers to limit data loading to). When the data is pulled and is less than or equal to the limit it is populated in a table.  When the limit is exceeded the data is not cleared in the table. Instead the result of the last on demand results are still present.  Since there is no visual message that the query failed our users would assume there was not a problem.  Any visualizations that use the on demand data should be cleared when the limit is exceeded. This works sometimes but not consistently which is worse than not working at all.