Recently a friend asked me for help. He was having the same problem.
I was informed about the CyberCP code and it actually has a bug that only happens on Debian, Ubuntu or Ubuntu-based distros.
To fix the error you are editing the file /usr/local/CyberCP/websiteFunctions/website.py
on line 3579 you will put the following code
if ProcessUtilities.decideDistro() == ProcessUtilities.ubuntu or ProcessUtilities.decideDistro() == ProcessUtilities.ubuntu20:
command = 'systemctl restart cron'
ProcessUtilities.executioner(command)
Add the same code on line 3539.
This will make cronjob restart every time there is a change.
Restart CyberCP after changes
systemctl restart lscpd
This is a patchwork fix until an update fixes this