Zapier action to connect multiple items to board

I have a Zap with an action step to create a new item on monday. One of the columns in the monday board is a ‘connect board’ column.

When I map a list of ids to the Connect Board column, I get this error when I create the item:

Failed to create an item in
Invalid value for undefined on undefined. There are items that are not in the connected boards

When I map only one id, it works and creates the item accordingly.

I can confirm that all items that I’m trying to connect are in the corresponding board, and based on this documentation, it should work…

See recording below;

I appreciate any feedback you may be able to provide.