pub topic is PacketId=undefined

[wangchy0927]

erl version
otp_src_23.0.tar.gz

the pub script

./emqtt_bench pub -h 192.168.0.41 -p 1883 -c 5 -I 10 -t bench/%i

log
<<"server1_bench_pub_9_1727535783">>@192.168.0.148:59350 [MQTT] RECV PUBLISH(Q0, R0, D0, Topic=bench/undefined, PacketId=undefined
TOPIC is bench/undefined i think the right is bench/6 bench/7 bench/8 bench/9 bench/10

the sub script
./emqtt_bench sub -h 192.168.0.41 -p 1883 -c 5 -i 10 -t bench/%i
Dashboad topic is right