pyshark.liveCapture drop packets?

[Lzhou2020]

When comparing the packets captured in "live_cap.pcap" by the function: cap = pyshark.LiveCapture(interface='eth0',bpf_filter="ip", output_file = “live_cap.pcap”) with the packets captured simultaneously by Wireshark in a pcap file, the packets in "live_cap.pcap" is much less. Please help to answer whether there is packet drop issue in the pyshark.live_capture function, or some parameter setting is wrong, how to resolve the packet missing problem? (this problem was posted in https://github.com/KimiNewt/pyshark/issues/495, no answer yet) Thanks.