Hello Jasdeep,

Thank you for posting in the community.

What you are describing seems to be the default behavior of igGrid as clicking on an unselected row's cells would unselect the selected rows and also automatically uncheck their checkboxes. If you are using row selection and wish to ensure that rows would not be unselected when clicking on unselected row's cells (or that when clicking on an already selected row the other currently selected rows won't be unselected) you may use something similar to:

                    features: [
                    {
                        name: "RowSelectors",
                        enableCheckBoxes: true
                    },
                    {
                        name: "Selection",
                        mode: "row",
                        multipleSelection: true,
                        rowSelectionChanging: function(evt, ui) {
                            var rowIndex = ui.row.index;
                            var selectedRows = ui.selectedRows;
 
                            for(i=0; i <selectedRows.length; i++) {
                                if(selectedRows[i].index === rowIndex) {
                                    evt.preventDefault();
                                    return;
                                }
                            }
 
                            evt.preventDefault();
                            $("#rowSelectorsGrid").igGridSelection("selectRow", rowIndex);
 
                            debugger;
                        }
                    }
                ]

Please let me know if this helps.