In an ipv6 environment, the time for channelActive printing in netty is delayed by 20 seconds compared to the three-way handshake of tcpdump packet capture netty 在ipv6 环境下channelActive 打印的时间与tcpdump 抓包三次握手的时间延迟20秒

[weil-f]

The time of the three-way handshake in tcpdump packet capture

The time when channelActive prints in the netty program
2025-06-24 15:29:47.944|[epollEventLoopGroup-7-1]|INFO | con.weil.netty.handler.ServerChannelHandler.print(ServerChannelHandler.java:187)
|��接报告 channelId:3e53250c remote: hostName:2409:8e04:e201:2201:4ab0:2dff:fe3c:8b5e%0,hostAddress:2409:8e04:e201:2201:4ab0:2dff:fe3c:8b5e%0,hostString:2409:8e04:e201:2201:4ab0:2dff:fe3c:8b5e%0,port:54288 local: hostName:k8s-master01,hostAddress:fd20:d1a9:3c86:8111:12:0:1:2a%0,hostString:k8s-master01,port:12005

The time of packet capture is：Jun 24, 2025 17:25:51.448947000 CST
The printing time of channelActive：2025-06-24 15:29:47.944
Why is this?