MQTT Broker listen messages randomly

[bastianfbr]

Bug Description

After working a lot with n8n, i did some workflows with MQTT Triggers. Everything worked fine before but now worfklows are randomly triggers. I have a program which send messages to topics i listen. Messages are really sent but triggers are 1/100 triggered... What can i do ? Sounds like listeners aren't always listening.

In addition, I have a custom MQTT trigger in a workflow that avoid listening to retained messages and when i want to enable it, i have this error :

To Reproduce

Create several workflows with MQTT Triggers
Activate all and see them not triggered

Expected behavior

Just want that everything works as expected : should be triggered every time a message is listened

Operating System

Windows 11

n8n Version

1.57.0

Node.js Version

18

Database

PostgreSQL

Execution mode

main (default)

[Joffcom]

Hey @bastianfbr,

We have created an internal ticket to look into this which we will be tracking as "GHC-229"

[Joffcom]

Hey @bastianfbr,

Are you using the same mqtt topic or different topics and how many do you get up to before seeing the issue?

[bastianfbr]

It was for the same topic

[Joffcom]

Hey @bastianfbr,

Typically I would expect one workflow and trigger per topic, Can you share a bit more info about what it is you are doing?