Update

Author: mattblank11

src/Merge.Client/Core/RawClient.cs

@@ -265,11 +265,22 @@ Dictionary<string, object> inputDict
                     result.Add(new KeyValuePair<string, string>(kvp.Key, str));
                     break;
                 case IEnumerable<string> strList:
-                    result.Add(new KeyValuePair<string, string>(kvp.Key, string.Join(",", strList)));
-                    break;
-                case IEnumerable<object> objList:
-                    result.Add(new KeyValuePair<string, string>(kvp.Key, string.Join(",", objList)));
+                {
+                    if (kvp.Key == "expand")
+                    {
+                        result.Add(new KeyValuePair<string, string>(kvp.Key, string.Join(",", strList)));
+                    }
+                    else
+                    {
+                        
+                    foreach (var value in strList)
+                    {
+                        result.Add(new KeyValuePair<string, string>(kvp.Key, value));
+                    }
+                    }
+
                     break;
+                }
             }
         }