Now our website uses 2 tracker addresses

We use two tracker addresses to resolve the IPV4 and IPV6 networks separately. When the user has both IPV4 and IPV6 networks, the IPV4 and IPV6 network addresses can be connected.
If you only have one type of network, it doesn't matter, just work with a tracker address.

ipv4.joyhd.net , just for IPV4 network
ipv6.joyhd.net , just for IPV6 network,

If one of the addresses can work, it is ok