Fix

Author: 0x5bfa

src/Files.App.Controls/Sidebar/SidebarView.Properties.cs

@@ -49,6 +49,7 @@ partial void OnIsPaneOpenPropertyChanged(DependencyPropertyChangedEventArgs e)
 
 		partial void OnOpenPaneLengthPropertyChanged(DependencyPropertyChangedEventArgs e)
 		{
+			NegativeOpenPaneLength = -(double)(e.NewValue);
 			UpdateOpenPaneLengthColumn();
 		}
 	}