I have a grid with a large number or columns.The first 4 columns are
frozen. I have some columns that I set the column background color in
the code behind and some i set in the XAML. For those columns that I
set the background color in the code behind, when i scroll horizontally
and partially obscure it behind the last frozen column, and then I
scroll vertically the color of the the column will show thru the frozen
column.
See Attached picture