Cron jobs under user not running.

I am trying to troubleshoot an issue with cronjobs running on a Rhel system.
the seem to have stopped.
The os is Rhel 7.7

I have checked the crond service is running,
The cron jobs exist under /var/spool/cron/userb
there is also a /var/spool/cron/root however this does not contain the crond jobs that are not running

when you run the command crontab -l you get the output as follows

0 5 * * * /usr/sbin/aide --check

I can see reference to this running in the cron logs

however if you run crontab -u userb -l
the cronjobs in question are present however they are not being executed.
i have checked the /var/log/cron and /var/log/message and see no associated logs.

I have also amended the cronjob to output the results to a log directory and that directory remains empty.

Im a little perplexed at this point, what should i do from here?