RabbitMQ MQTT integration - Downlink problems

Hello @brocaar and community,

I have one application and I need to use MQTT integration. The uplinks working great, the mannual downlink in the application work great. However when I pub to this topic “application/1/device/f803320100023db0/command/down” as the reference provide by chirpstack “application/[ApplicationID]/device/[DevEUI]/command/down”
It just dont work! My Rabbit is running in the same ubuntu as my mosquitto. Can be something related to that? I also change the port of my rabbitMQ to 1884 just for tests, the uplink is still working but the downlink don’t. My device is a class C.