Cron Jobs not running on backups

[MoeK]

Hello.

We have three firewalls in a HA setup.
For this firewall 1 syncs the config to firewall 2 and 2 syncs it to number 3.

Now we wanted to automate the syncing through the "HA update and reconfigure backup" cronjob.
While it is running fine on firewall 1, number 2 won't run the job automatically.
I looked up this and it seems that this is on purpose on firewalls that are not the master.
But while digging I also noticed, that on firewalls 2 and 3 the "update and reload intrusion detection rules" cronjob is also not running at all.

So why are these jobs not running on the standby firewalls?
How can i configure firewall 2 to run the config sync periodically?
Is there any way to run these jobs through the CLI?

Thank you in advance!