Cronjobs on multiple webservers

In a nextcloud (13.0.0) setup with multiple webservers, should the background jobs cronjob only be running on one server? Is there any harm in running it on multiple servers?
I have looked in the official documentation but it doesn’t seem to cover this scenario.

Many thanks, George

shared database so - one should suffice but more works, too. This is covered in https://portal.nextcloud.com/article/scaling-across-multiple-machines-20.html