You can try overlaying the below paths, you need to check the code in provider.jsp, if the URL contains nA then don't fire workflow. you need to do some analysis on this.
/libs/cq/gui/components/coral/common/admin/timeline/alerts/workflow/provider.jsp
/libs/dam/gui/coral/content/commons/sidepanels/timeline/items/alerts/items/workflows
The other option is if you know what workflow you are going to fire, then you can create a workflow step, that should execute at the starting of the workflow, inside the workflow step check if the URL contains ends with "nA" then end the workflow.