Default port on BIG-IP 14.1?

I noticed that the default port for the BIG-IP 14.1 version (which used to be 443) is now 8443. I would like to ask you, if that is the new port by default or is this an error? Also, I encountered an error while trying to change the port (with the command: tmsh modify sys httpd ssl-port 443) to 443 , which would then revert to 8443 as soon as I would reboot the virtual machine. This change persists even if I try to save the system configuration (with the command: tmsh save sys config) with 443 as the chosen port - once I try to load the saved system configuration or reboot the machine, the port changes to 8443 once again.