I have a custom date field on my primary card and I would like for the same custom date field on any cards linked to that primary card to be updated when the date field of the primary card is changed. I have tried several automation rules, but I get either a 'Couldn't read date in "{2025-12-31T17:00:00.000Z}".' error or 'A possible loop was detected' error. The one time the rule worked, the custom date field on the linked cards was changed to the current date (like if I had selected the Now date variable) rather than changing to the custom field variable of the trigger card (which was 12/31/25) and I received the loop error message.
The rule I used when the custom date fields on the linked cards changed to the wrong date and I received the loop error message was: When custom field "Project End Date" is set, for each card linked in the attachments, set custom field "Project End Date" to "{trigger{{%Project End Date}}}"
The rule I used when the correct custom date couldn't be read was: When custom field "Project End Date" is set, for each card linked in the attachments, set custom field "Project End Date" to "{{customfieldvalue}}"
I know that there are built in automations for Start/Due Dates or for when custom date fields are in/not in specific time frames, but I'm stumped regarding how to write an automation rule for my specific scenario. Any guidance is appreciated. Thank you.
