# \[BUG\] 8.1.12 Reference tags, MQTT Engine and leading spaces

**URL:** <https://forum.inductiveautomation.com/t/bug-8-1-12-reference-tags-mqtt-engine-and-leading-spaces/53724>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [December 3, 2021, 11:06am UTC](https://forum.inductiveautomation.com/t/bug-8-1-12-reference-tags-mqtt-engine-and-leading-spaces/53724 "2021-12-03T11:06:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![louagejasper](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/louagejasper/32/86311_2.png) [@louagejasper](https://forum.inductiveautomation.com/u/louagejasper)\
**Post date:** [December 3, 2021, 11:06am UTC](https://forum.inductiveautomation.com/t/bug-8-1-12-reference-tags-mqtt-engine-and-leading-spaces/53724/1 "2021-12-03T11:06:26Z")

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We have found a bug in Ignition 8.1.12 (and probably previous versions).

**What is the problem?**  
We have tags and UDT’s being published from local servers to a central enterprise server.  
The problems we encountered are the following:

- When we did a new push of data, all data did reset to 0, which was also logged in the historian.
- When we have reference tags setup to the MQTT Engine tags, they keep at value 0 when we update the data with a fresh data push

**How can the problem be reproduced?**  
When tagnames end with a space - so something like 'Site/Line/Machine/temperature ’ - Ignition finds this all okay and publishes this over MQTT just like this. This is when the problem happens.

**How can the problem be solved?**  
Workaround is obviously not having tagnames ending with a space. However, If things go wrong when you do this, Ignition should automatically do either one:

- Not allow you to end tagname with a space
- Automatically remove leading or ending spaces in a tagname when tags are created