In the DVCC description in the Cerbo GX manual, DVCC section there is the statement
Limit charge current is a user-configurable maximum charge current setting. It works across the whole system, whereby Solar is prioritised first, then the Orion XS DC-DC battery charger and then the inverter/charger.
With the integration of alternator regulators such as the Wakespeed WS500 and Arco Zeus into DVCC, it appears when battery charge current is limited towards the end of charge, the alternator is prioritised over solar. See chart below.
It would be better if solar was priorities over alternator per the Orion XS.