Slick Grid custom checkbox not maintaining selection onSort

I have 2 columns with checkboxes. I implemented them using a formatter because the checkbox plugin does not work well with multiple columns having checkboxes( I tried giving different id and still selection is an issue when using plugin)

Now the current issue that I am getting is the selection of any checkbox is not maintained when I click sort or perform any other action on the slickgrid.

I tried using syncGridSelection(grid, true) but it is not working. Could anyone please help me with this.

Thanks Anton