Using such negative margin leads to some parts of the template to be actually outside of the control boundaries.

The fix for this issue will be available with the next LIB (version 2018.3.1203) expected on Monday, December 3.

Currently search tries to match the search value to the complex object value, which always provides negative results. Adding such property will enable search over a primitive type, or string property of the given object.

Check Demos >> GridView >> Hierarchy

First HeaderCell should be aligned with the first cell in the gridview. You can find a screenshot attached. 

If you set BorderThickness through a custom CellStyle, the left border is overwritten by our code. 

Add a mechanism to fix the current viewport (scrollbar position) when new items are inserted. Currently, when you insert items before the viewport's start, the scrollbar position is offset.

To work this around set the GroupRenderMode property of RadGridView to Flat.

When GroupRenderMode is set to Nested the issue can be overcome by calling the BringIntoView method on the row returned in the ScrollIntoViewAsync method's callback:  
gridView.ScrollIndexIntoViewAsync(index,
  new Action<FrameworkElement>((f) =>
  {
      f.BringIntoView();
  }));

Placing text in quotes after exclude search operator and search getting the wrong result. As a workaround to get the desired result the search string can be changed in this way: from  -"Rio de" to  -Rio + -de.