# MQTT Engine and MQTT Transmitter Data Mismatch

**URL:** <https://forum.inductiveautomation.com/t/mqtt-engine-and-mqtt-transmitter-data-mismatch/114945>\
**Category:** Ignition\
**Tags:** perspective, ignition81\
**Created:** [April 8, 2026, 10:07am UTC](https://forum.inductiveautomation.com/t/mqtt-engine-and-mqtt-transmitter-data-mismatch/114945 "2026-04-08T10:07:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![xinru.tey](https://avatars.discourse-cdn.com/v4/letter/x/7ba0ec/32.png) [@xinru.tey](https://forum.inductiveautomation.com/u/xinru.tey)\
**Post date:** [April 8, 2026, 10:07am UTC](https://forum.inductiveautomation.com/t/mqtt-engine-and-mqtt-transmitter-data-mismatch/114945/1 "2026-04-08T10:07:56Z")

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> [@MQTT Engine value not updating](https://forum.inductiveautomation.com/t/mqtt-engine-value-not-updating/114913/1):
>
> The client side consists of Ignition Edge running inside APE with MQTT Transmission enabled.
> 
> On the server side, there is an Ignition Server with MQTT Engine and MQTT Distributor / Broker.
> 
> When a value is changed from Perspective on the server, the value is written to MQTT Engine. MQTT Engine then publishes the updated value through the MQTT Distributor / Broker. The client-side Ignition Edge receives the updated value through MQTT Transmission and updates the local Edge tags or PLC values.
> 
> The communication also works in reverse. When a value changes on the client side, Ignition Edge MQTT Transmission publishes the value to the MQTT Distributor / Broker, and MQTT Engine on the server receives and updates the corresponding server tag.
> 
> For now, the MQTT client receives the change correctly, but the MQTT Engine tag remains unchanged. if I restart the tag or manually change the tag value, it starts functioning normally again.
> 
> How to solve it?

We are using MQTT Distributor/Engine/Transmitter version 4.0.34

Ignition Version 8.1.48

Does anyone face the same issue here?