Using one-to-many or many-to-many field shortcuts in markdown template

Hi everyone,
I’ve created an automation that appends in the description field of an item in database A, the content of another item in database B that has a many-to-many relation with A.
I’ve used the formula {- Field Name in A.Field1 Name in B -} as described in the section “Using one-to-many or many-to-many field shortcuts” inside the Markdown Template Guide however, instead of the field’s value I get its Id.
Does someone has any idea about what I’m supposedly doing wrong?

Thank you in advance!

You’re not doing anything wrong. Accessing rich text for a related entity only works for to-one relations.
You can access primitive fields for entities in collection relations this way, but not rich text.