This thread is odd, we've had no issues (knock on wood) with crons.
Either thru CPW or directly thru the CLI.
What OS's are you using where this is failing?
I migrated my server from cPanel to CWP Pro on Almalinux 8 last November.
Although Root-side CronJobs work fine, User CronJobs don't.
The weird thing is that the cronjob executes but there is no effect at all...nothing happening.
I'm using CronJobs for WordPress installations. Cronjob running (according to the log) no action taking place in WordPress.
My server company cannot understand what is the issue even after months of troubleshooting and they attribute it to one of CWP's bugs.
Any suggestions?