Fail2Ban Keeps Turning Off

I seem to be having an issue on a server with Fail2Ban (ip_ban) turning off. I will occasionally log in to the admin panel in Plesk and I will find IP Address Banning turned off. I will enabled it again and things will be fine for a while but then once again it will turn off. Any idea what might be causing this? The server is running Plesk Onyx 17.5.3 Update #17 and CentOS 7.3.

Thanks in advance.