Sort AdvStringGrid by checkbox

How can I sort the AdvStringGrid by checkboxes?  My checkbox column has no other values in it but the checkbox. 


I cannot see a problem with using AddCheckBoxColumn & sorting.
Please inform how we can reproduce this. Without any information about how you use the component, we can unfortunately not help.

Sorry, I'd set the SortStyle to ssCustom because of some custom sorting I need to do in another column.