Fortimus
Mirror ItemMirror Item — Troubleshooting

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Common Mirror Item issues and how to fix them.

All fixes, step by step

Items are not syncing

A mirrored item is not updating when the source item changes.

Common causes

  • The mirror connection was removed or reset after a board change.
  • The source item was moved to a different group or board.
  • A column was renamed or its type changed, so it no longer matches across boards.
  • The account hit the free plan limit of 5 mirrored items.

How to fix it

  1. Open the item on the source board and click the Mirror Item app panel.
  2. Check that the target board and group are still selected. If the fields are blank, the connection was lost — re-configure it.
  3. Check the columns still match. Columns sync by name and type, so if a column was renamed or deleted on either board, rename it back or match it on the other board.
  4. If you are on the free plan, check your mirrored item count. Items above the 5-item limit will not sync.
  5. Save the configuration again and trigger a manual sync by making a small edit to the source item.

Tip: If the issue started after a board restructure (renaming groups, moving items), re-saving the mirror config is usually all it takes.

Mirrored columns are not populating

The item mirrors but certain column values are empty or not carrying over.

Common causes

  • The column type on the source board does not match the target board.
  • The column is named differently on one board, or it was excluded from sync for this item.
  • Some column types (e.g. Formula, Auto Number) are read-only and cannot be mirrored.
  • The Connect Boards column has not been auto-filled yet.

How to fix it

  1. Open Mirror Item on the item and look at the common columns in the Where this item lives table.
  2. Check that each column you expect to sync exists on the target board with exactly the same name, including capitals.
  3. Check the column types match. A Status column syncs with a Status column, not a Text column.
  4. Formula and Auto Number columns are computed by monday.com and cannot be written by apps. These columns cannot be mirrored.
  5. For Connect Boards columns, enable the Auto-fill Connect Boards Column setting inside Mirror Item to populate them automatically.
  6. Re-save the mirror and make a change to the source item to trigger a fresh sync.

Tip: The most common cause is a name or type mismatch. People columns sync with People columns, Status with Status, and so on.

Automations are not triggering

A Mirror Item automation recipe is saved but not firing when conditions are met.

Common causes

  • Automations are available on the Standard plan and above — the Basic plan does not include them.
  • The trigger condition (e.g. Status column value) does not exactly match what was configured.
  • The automation was saved but not activated.
  • A filter on the automation is blocking it from running.

How to fix it

  1. Confirm your account is on the Standard plan or above. Go to Mirror Item settings and check your plan tier.
  2. Open the automation recipe and verify the trigger column and value match exactly what you are testing. Status labels are case-sensitive.
  3. Check that the automation is toggled on — a saved automation is not the same as an active one.
  4. If you have added filters (e.g. "only run if Assignee is X"), make sure the item meets all filter conditions.
  5. Test with a simple trigger first (no filters) to confirm the automation runs at all, then add filters back one at a time.

Tip: Status-based triggers are the most common cause of confusion. "In Progress" and "in progress" are treated differently — match the label exactly as it appears on the board.

Subitems are duplicating

Subitems appear more than once on the target board after mirroring.

Common causes

  • Subitem sync is enabled in Mirror Item while subitems are also being mirrored manually.
  • The mirror was triggered multiple times for the same item (e.g. via automation and manually).
  • An automation is set to run on subitem changes and is creating new mirrors on each update.

How to fix it

  1. Check whether you have subitem sync enabled inside Mirror Item settings AND a separate manual mirror set up for the same subitems. Use one approach only.
  2. Delete the duplicate subitems on the target board.
  3. Open Mirror Item on the parent item and confirm subitem sync is either on or off — not both configured via different methods.
  4. If you are using an automation to mirror subitems, make sure the trigger fires once per item, not once per subitem update.
  5. Re-save the parent item mirror to reset the subitem sync state.

Tip: The easiest fix is to turn on subitem sync inside Mirror Item settings and remove any manual subitem mirrors. Let the app handle it in one place.

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