AI DeepSeek offered following solution as an option

Procedure PresentationGetProcessing(Data, Presentation, StandardProcessing)
    
    StandardProcessing = False;
    
    Try
        If Data.Ref = Undefined Then
            StandardProcessing = True;
            Return;
        EndIf;
        
        If Data.Ref.IsEmpty() Then
            StandardProcessing = True;
            Return;
        EndIf;
        
        fullDescr = Data.Ref.FullDescr();
        Presentation = StrReplace(fullDescr, "/", ", ");
        
    Except
        // If any error occurs, fall back to standard processing
        StandardProcessing = True;
    EndTry;
    
EndProcedure

But I am not sure that this is the correct way...

Looking forward for other answers...