Issue Summary

If a board has an automation that adds information (labels/members/etc) to a card when it's created, that will prevent the card from becoming a mirrored card

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. Set up a board automation that adds a label to a card when it's created
2. Create a mirror card on that board

Expected Results

Automations do not add labels to mirror cards

Actual Results

A regular card with the source card's link in its name and a label gets created instead

Workaround

You can specify your automations to only act when a card with no role is created, instead of any card. This will require redoing the existing automations. This is currently not working.
You can disable any interfering automation, create the necessary mirror cards, and then re-enable the automation.