The latest release of Roads and Highways in ArcGIS Pro 2.8 and Enterprise 10.9 is now available. The issues addressed in these versions can be found below.
In ArcGIS Server, the issues are grouped under Location Referencing.
https://support.esri.com/en/download/7890
For Pro, the issues aren't broken out based on the product/capability at this release. The Pro issues related to Roads and Highways are BUG-000136906 and BUG-000134584.
https://pro.arcgis.com/en/pro-app/latest/get-started/release-notes.htm
