CRON Jobs are not working as Expected

Hello Shopware geeks,

I need “Email notification” CRON job to be triggered when a product comes into stck, I have followed all the steps mentioned in below documentation

I have set date and time in the backend, disabled all other CRON job but no result. Executed CRON through browser and terminal. 

I need to know what will be the blocking point for CRON job to execute as expected.

Waiting for suggestions/answers.

Thank you,

Ajit.