To reproduce:
- Add RadPropertyGrid to a form and set the theme to MaterialTeal. The issue is observed in the ThemeViewer as well.

Workaround:
radPropertyGrid1.PropertyGridElement.ToolbarElement.AlphabeticalToggleButton.TextWrap = true;
radPropertyGrid1.PropertyGridElement.ToolbarElement.CategorizedToggleButton.TextWrap = true;
//or

 radPropertyGrid1.PropertyGridElement.ToolbarElementHeight = 68;