TYPO3 Core

When I use IRRE with UseCombined mode there are something wrong:

My setup is:

Records with Authors who have relations to Books. Books has relation to Publisher. I use the foreign_selector and foreign_unique with useCombined.

These relations is m:n

The problem is when I relate a Book to Publisher. I select the publisher by the foreign_selector and the Publisher relation to Book is created. It's working fine with the first book.

If I create Book number 2 for the Author and select same Publisher as the first Book to the new book the children fields is empty.

I assume it's a DOM issue because the children fields for both publishers has same names?

(issue imported from #M8424)