Why is NTP going crazy?

[Mindflayer]

Hello everyone,

I just connected a freshly installed OPNsense via PPPoE to the internet and watched the Firewall Live View a bit. What caught my attention are hundrets of connections to various different IPs, going from and to Port 123. Sometimes the entire page was only "123" connections and a few block inbound ones:

https://ibb.co/9YJV2yC

And indeed, on the Status page of the Network Time Service, I found a lot of these IPs again:

https://ibb.co/x6rS5mc

The configuration of the Network Time Service is completely untouched. Only those [0-3].opnsense.pool.ntp.org servers are configured with the first one being prefered.
Is there something wrong with the default settings:

https://ibb.co/HpQfP2Q

How can I make the Network Time Service only try one server and not connect to so many?

Thank you.

[meyergru]

If you really want that, just use servers, not pools.

[decibel]

Your 3rd picture does not show the top of the page where it gives the number of servers you are looking at.