Update a Card in Trello - Description field being overwritten with values from custom fields

  • 7 December 2021
  • 1 reply

Userlevel 1

Hi everyone,

I think I may have stumbled across a bug with the Update a Trello Card Action.

It is something that is new, and has caused unwanted outcomes on zaps that were previously working perfectly.  Issue seems to be:
   - we update two custom fields on a trello card, including one being a URL, as an action item in a zap.  
   - we are ONLY updating those two fields.  The Description field is untouched.
   - when the zap runs, the custom fields update, but then the Description field info is overwritten by the URL and additional unintended info. 

I’m stumped, and am reasonably experienced with Trello, and can’t figure it out.  I’m thinking I’m not the problem.


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1 reply

Userlevel 7
Badge +14

Hi @Jangus 

Check if there are other Zaps ON that may be triggered.


Check your Zap Runs for the DATA IN/OUT for each Zap step to help troubleshoot:


Please post screenshots with how your Zap steps are configured.

Please also provide a specific example where you believe this behavior is happening.


You can open a ticket with Zapier Support if you believe there is a bug: