Dunn & Bradstreet (D&B) is mainly used for assessing credit risk. They get their info from Companies House & public records. Credit info on individual subsidiary companies is not really helpful when companies are wholly owned subsidiaries of the PLC - unless of course your intention to do business with a particular division.
Negative info is to do with credit risk, probably from relative performance, negative changes to individual subsidiary’s balance sheet or even the subsidiary being wound up.
Hardly surprising in the case of YOO since have been restructuring for the last 2 years.
Neither is it surprising that PR doesn’t know such specifics – a PLC such as YOO would probably be forming and winding up companies all the time.