diff --git a/models/transformers/bert_w2ner.go b/models/transformers/bert_w2ner.go
index c40a37a..6b8deb0 100644
--- a/models/transformers/bert_w2ner.go
+++ b/models/transformers/bert_w2ner.go
@@ -61,6 +61,15 @@ func generateInitDistInputs(size int) [][]int32 {
 	return matrix
 }
 
+func generateAllTrueSlice(size int) []bool {
+	matrix := make([]bool, size)
+	for i := 0; i < size; i++ {
+		matrix[i] = true
+	}
+
+	return matrix
+}
+
 ///////////////////////////////////////// Bert Service Pre-Process Function /////////////////////////////////////////
 
 // getBertInputFeature Get Bert-W2NER Feature (before Make HTTP or GRPC Request).
@@ -100,9 +109,9 @@ func (w *W2NerModelService) getBertInputFeature(batchInferData [][]string) []*W2
 
 		start := 0
 		for j := 0; j < padTokenLen; j++ {
-			gridMask2d[j] = make([]bool, padTokenLen)
+			gridMask2d[j] = generateAllTrueSlice(padTokenLen)
 
-			if j+1 >= len(inferTokens) {
+			if j >= len(inferTokens) {
 				pieces2word[j] = make([]bool, len(batchInputFeatures[i].TokenIDs))
 				continue
 			}
@@ -127,7 +136,6 @@ func (w *W2NerModelService) getBertInputFeature(batchInferData [][]string) []*W2
 
 	// distInputs
 	for i, inferTokens := range batchInferTokens {
-		// len(inferTokens)
 		distInputs := generateInitDistInputs(len(inferTokens))
 		for j := 0; j < len(inferTokens); j++ {
 			for k := 0; k < len(inferTokens); k++ {