The X Marker in Exclusive Gateway is not displaying when using bpmn-viewer.js

When I use the bpmn-viewer.js, it does not show the X marker, but when I use the bpmn-modeler.js, it does show the X marker. Is there a difference in rendering the exclusive gateway between bpmn-viewer.js and bpmn-modeler.js? If so, is there a property or toggle to display the X marker when using bpmn-viewer.js?