Hangfire recurring-jobs struck in queue

Hi team , I have scheduled a hangfire job to send mail at 9 30 pm everyday. It is hosted in IIS( .net core app). For some reason it will get struck in the queue. when ever I open the dashboard , it will get automatically execute. I have set IIS startmode alwaysrunning and Idle timeout 0. I want it be up and running all the time without getting struck in queue.
Please help