title: Sub Report Header not showing in Main Report
body: <p>I have one main report that's calling a sub-report. </p>
  
  <p>Inside this sub report I have a tablix. The tablix size will grow based on the data available in the column grouping. </p>
  
  <p>I have one header above tablix of constant size. I need to show the header on all of the pages, if the first group value contains multiple pages. </p>