MQTTX cannot use Topic Alias. MQTT5.0 主题别名发送卡住，无法发布主题别名的消息

[kason111999]

MQTTX 测试

[kason111999]

一旦发送了主题别名的消息久卡住，断开也无法断开一年MQTTX ,也无法断开

[werbenhu]

我调试了下，似乎服务端没有收到这个alias的Publish消息，出问题后，MQTTX断开链接，服务端也没有收到包，你用这个 https://github.com/eclipse/paho.mqtt.testing/blob/master/interoperability/client_test5.py 测试看看服务端，有没有可能是MQTTX客户端的问题？

I debugged it, and it seems that the server did not receive the Publish message with this alias. After the issue occurred, MQTTX disconnected, and the server did not receive any packets. Is it possible that the problem lies with the MQTTX client?