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Custom Fields not populating

Anthony June 11, 2025

Please help with the following Butler command

 

for each card linked in the attachments, set custom field "Builder" to "{{%Builder}}"

 

This used to work for many years whereby the parent card would copy the information to the subordinates... now it does not. Can you please advise if any changes to Trello?

 

Essentially, I am wanting to populate Custom Fields for all dependancies without mirroring (as they are their own separate card).

 

Many thanks,

 

Anthony.

1 answer

0 votes
Luciana Munhoz
Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
June 13, 2025

Hi Anthony!

It's hard to determine what could be happening from what you said. I recommend you access the board and go to the automation panel. Then find the corresponding automation. Above the rule, you will see a light bulb icon, which is the automation log. 

See if there are any errors that can identify why the automation is not running. 

If that doesn't help, please open a ticket to through our support portal so it can be investigate further.

Anthony June 13, 2025

I have done as he has suggested multiple times and every situation. It clears the field instead of populating up with the data from the parent card. I am unsure why there has been a change in Trello such that it has been working for years and now it has stopped working with the exactly the same Program. Please advise.?

Luciana Munhoz
Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
June 18, 2025

Hi Anthony, I'm not sure why it's clearing the field, but I was doing some testing and it worked when using the trigger when custom field XXX is set, and then instead of using the custom filed name, you use the variable {customfieldvalue}. Example:

when custom field "Builder" is set, for each card linked in the attachments, set custom field "Builder" to "{customfieldvalue}"


You can check this article as a reference. Hope that helps!

Anthony June 22, 2025

Thank you so much for this!... nearly there.. .however this rule will only act on a rule - I need it to be done in a "Card Button" can you please show me how I can do this?

Luciana Munhoz
Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
June 24, 2025

Hi @Anthony , I was checking this internally, and it seems that when trying to create a button, the behavior is the same, it clears the custom field.

For that reason, I have created a ticket for you, so our team can further investigate it.

You will receive a ticket notification in your email. :)

Anthony September 29, 2025

Hi @Luciana Munhoz it has been a few months - where are we at with this - the issue still exists and did not before I created this ticket. thanks.

Luciana Munhoz
Atlassian Team
Atlassian Team members are employees working across the company in a wide variety of roles.
October 2, 2025

Thank you for following up, Anthony! Back in June when we were communicating on the ticket, I checked with our developers and they confirmed that the current behavior of the card buttons is expected at this time.

The feature request that we submitted to our product team to consider improvements to automation is still open, and your feedback has been added internally to help highlight the importance.You can view and track the progress of this request here: 
https://jira.atlassian.com/browse/TRELLO-1401.

I recommend logging in with your Atlassian account and clicking Start watching this issue on the right side. This will make it so you’ll receive email notifications about any updates, and it also helps our product + engineering teams understand which features matter the most to our users. You’re also welcome to add any additional feedback or use cases directly to the suggestion.

I know this might not be the answer you were hoping for, but please know your input is heard and helps us shape future improvements. If you have any further questions, I’m here and happy to assist.

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