As detailed in the below UK Government document, Domestic Reverse charge should be applied when the Business is not the end user of the services and the purchase order is not materials only. Further information and requirements outlined in the document. The workaround currently is that the user has to review each PO and decide whether to override the VAT group accordingly to whether In-scope or Out-of-scope.

As this is a statutory requirement, this logic should be standard functionality.

www.gov.uk/guidance/vat-domestic-reverse-charge-for-building-and-construction-services