SiteCronJob Item Not Executing at Specified Time

[KSwanson2019]

Hi, I have installed SiteCron 3.0.9 in our production environment (1 CM server and 3 CD servers). Right now the SiteCron configuration is set-up as the default IndexJobProvider. I have created a SiteCronJob item to run a specific task once a day. If I choose 'Execute SiteCron Job Now!', the item will trigger the process, however it is not executing at the time specified in the Cron Expression. I have been using the utility from cronmaker.com to make sure syntax is correct. This is the fourth install and set-up I have completed for my organization (previous environments were playground, development, staging). The first three did not have this issue. I verified that the Quartz.dll was available on the web server as well. Any suggestions? Thank you!

[akshaysura]

Have you looked in to the SiteCron log and the regular log. From your description looks like it has all the things it needs to run a job including Quartz. Are you trying to run the job from the CM? also, do you have a publishing instance?

[KSwanson2019]

Hi, thank you for the response. Yes, SiteCron is configured only on the CM server only (Z.SiteCron folder only deployed to CM server and not to the 3 CD servers). As for the publishing instance, the separate publishing service module is not being used.
One observation that I have noted with the behavior after several days is that the scheduled tasks periodically execute, but not consistently and sometimes execute at the scheduled time and other times at a more random time. It almost appears like the process is getting bumped due to priorities?
Any thoughts? Thank you!!!

[akshaysura]

Would it be possible to send me the logs for that CM when the instance is reset?