The issue appears when you have two adjacent columns - one resizable on the left and one not-resizable (IsResizing=False) on the right. If you hide the left column (IsVisible=False), the resize handle of the right column is still there and it can be used to resize it. 

To work this around, you can remove the next column and add it again in the Columns collection, after you hide the previous column.

this.gridView.Columns[1].IsVisible ^= true;            
var nextColumn = this.gridView.Columns[2];
this.gridView.Columns.Remove(nextColumn);
this.gridView.Columns.Add(nextColumn);