Is there any issue with having a GFCI receptacle connected (terminally) on a circuit with a AFCI/GCFI combination breaker? If not, is there any advantage to having a GFCI outlet on this circuit (wet area)?
There is no advantage and it adds an annoyance factor. Both breaker and GFCI outlet will both trip on ground fault. But the user has to remember the breaker must be reset first.