Unable to capture a data stream that already exists

[zfl112113]

Unable to capture a data stream that already exists

From the container, ping the gateway ip of the namespace in which it resides, start ptcpdump in host with ptcpdump -i any --container-name [container_running_ping], no ping packets can be captured. restart ping command, can capture the ping packets now. That is, ptcpdump has to be started before the data transfer to be captured properly.
Is this the way it's supposed to be, or is there something wrong with my operation?

Expected behavior

Environment

• ptcpdump version:
  ptcpdump version 0.31.0
  libpcap version 1.10.5 (with TPACKET_V3)

• OS:
  Debian GNU/Linux 12 (bookworm)

• Kernel:
  Linux bogon 6.1.0-29-amd64 Bump github.com/cilium/ebpf from 0.14.0 to 0.15.0 #1 SMP PREEMPT_DYNAMIC Debian 6.1.123-1 (2025-01-02) x86_64 GNU/Linux

Additional context