title: SSRS Hiding a Group leaves one Detail Row
body: <p>I'm having an issue when I try to hide a group based off the value of a field.  My dataset contains a pre-calculated set of fields to indicate which groups can be hidden .  This is done because I need the numbers for some aggregate calculations from all the rows, but some of the rows end up in groups that are unimportant to the user.</p>
  
  <p>However, when the report renders, the group is hidden but one 'detail' row from the group remains visible.  The 'show hide based on expression' is set to the field that is a boolean indicating whether or not the group should be hidden.  Even if I do the exact same thing but instead change away from the expression and just select 'Hidden' then the same artifact occurs.</p>
  
  <p>Has anyone seen this and fixed it?</p>