Hi all , we got an issue described in the following github repo, but it points to the MQTT 5 spec.
https://github.com/mqtt/mqtt.org/issues/146 Think the comment is right and it is true that the behavior is not correctly described in relation to the MQTT 3.1.1. behavior. Best regards -- Herzliche GrÃÃe Anja Helmbrecht-Schaar -- Anja Helmbrecht-Schaar Senior Consultant (MQTT and IoT Architecture) phone +49 151 655 32 566 HiveMQ GmbH Ergoldinger Str. 2a 84030 Landshut Germany Registergericht Landshut HRB 8906 GeschÃftsfÃhrer: Christian GÃtz Dominik Obermaier