diff --git a/lib/stringify.js b/lib/stringify.js
index b8cee4bc..14122d97 100644
--- a/lib/stringify.js
+++ b/lib/stringify.js
@@ -102,6 +102,14 @@ var stringify = function stringify(
     if (isNonNullishPrimitive(obj) || utils.isBuffer(obj)) {
         if (encoder) {
             var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder, charset, 'key', format);
+            if(generateArrayPrefix === 'comma' && encodeValuesOnly){
+                const valuesArray = String(obj).split(',');
+                let valuesJoined = "";
+                for (var i = 0; i < valuesArray.length; ++i) {
+                    valuesJoined = valuesJoined.concat(((i===0)?'':',') + formatter(encoder(valuesArray[i], defaults.encoder, charset, 'value', format)));
+                }
+                return [formatter(keyValue) + '=' + valuesJoined];
+            }
             return [formatter(keyValue) + '=' + formatter(encoder(obj, defaults.encoder, charset, 'value', format))];
         }
         return [formatter(prefix) + '=' + formatter(String(obj))];