I can't use mirrored columns in automations anymore

This error is already well known. Search for “mirror columns” and you will see some related posts.

It seems that when monday needs to pull information between mirrored boards with more than 2 links there is a problem.

Imagine the following scenario:

board 1

  • Column 1

board 2

  • Link Column 2 (Board 1)
  • Mirror Column 3 (= Column 1)

board 3

  • Link Column 4 (Board 2)
  • Mirror Column 5 (= Mirror Column 3).

In this scenario, it will not be possible to filter by Mirror Column 5 on board 3 nor make any reference to this column.

See this