This recommendation comes in the 100+ page response from the Chief Executive of the County Council to the Hammerson-Allianz plans as lodged with An Bord Pleanála.
You can see the report by clicking on this link. The grounds for recommending refusal are on pages 79 – to 81.
Notably the final paragraph of the report states “The planning authority considers it would not be appropriate in the circumstances to specify planning conditions given that some of the recommended reasons for refusal relate to fundamental development principles and cannot be addressed via Condition”
An RTE report of 14th June gave a useful summary: https://www.rte.ie/news/business/2022/0614/1304872-council-recommends-refusal-of-881-unit-dundrum-block/
Update: An Bord Pleanála was due to give its decision on the Hammerson-Allianz planning application on July 25th , but announced a few days earlier that it would be delayed. No reason was given, and no new date has been set