EMQX 版本
EMQX 5.3.0
偶发消息延迟问题，最长会达到20分钟，开启日志追踪发现，emq在发送消息后收到PUBREC 、PUBCOMP 消息会间隔6秒，请问这会是什么原因引起的？
2024-04-17T08:06:17.959413+00:00 [MQTT]??? msg: mqtt_packet_sent, packet: [[80,85,66,76,73,83,72,40,81,“2”,44,32,82,“0”,44,32,68,“0”],“, “,[[84,111,112,105,99,61,”???”,44,32,80,97,99,107,101,116,73,100,61,“13868”],“, “,[“Payload=”,{error,[25,4,26,20,0,0,0,54,10,22,8],<<217,231,21,17,128,101,60,67,185,2,199,23,25,128,101,60,67,185,2,199,23,34,28,18,26,10,24,8,246,154,155,241,8,17,128,101,60,67,185,2,199,23,25,128,101,60,67,185,2,199,23>>}]],”)”]
2024-04-17T08:06:23.719856+00:00 [MQTT]??? msg: mqtt_packet_received, packet: PUBREC(Q0, R0, D0, PacketId=13868, ReasonCode=0)
2024-04-17T08:06:23.720732+00:00 [MQTT]??? msg: mqtt_packet_sent, packet: PUBREL(Q1, R0, D0, PacketId=13868, ReasonCode=0)
2024-04-17T08:06:28.641475+00:00 [MQTT]??? msg: mqtt_packet_received, packet: PUBCOMP(Q0, R0, D0, PacketId=13868, ReasonCode=0)