Custom id field is not recognized as such when placed inside of a row/collapsible

Hi, I'm not sure if this would be considered a bug or a documentation issue.

To create a custom id, we can explicitly declare an

field with type text or number (

). However, in my experience, this field also needs to be at the root of the collection's fields list. So, if the

field is declared within a row or collapsible, it no longer is recognized as a custom id field, and just a normal field that happen to be named

. In the DB, there will be a

field (the actual id), and

, just a normal text/number field.

I can understand the custom id cannot be within a group, a block, an array, or (named) tabs, as these fields can change the data structure in DB. However in the docs, the row and collapsible fields are said to be "presentational-only and only affects the Admin panel". The way I see it, either it is an intented behavior, in which case there could be a note about this here

, or it is not and I can open a bug report.

Custom id field is not recognized as such when placed inside of a row/collapsible