diff --git a/modules/indexer/issues/bleve/bleve.go b/modules/indexer/issues/bleve/bleve.go
index a7c87c8f47..94e4ed8cc4 100644
--- a/modules/indexer/issues/bleve/bleve.go
+++ b/modules/indexer/issues/bleve/bleve.go
@@ -13,7 +13,6 @@ import (
 
 	"github.com/blevesearch/bleve/v2"
 	"github.com/blevesearch/bleve/v2/analysis/analyzer/custom"
-	"github.com/blevesearch/bleve/v2/analysis/token/camelcase"
 	"github.com/blevesearch/bleve/v2/analysis/token/lowercase"
 	"github.com/blevesearch/bleve/v2/analysis/token/unicodenorm"
 	"github.com/blevesearch/bleve/v2/analysis/tokenizer/unicode"
@@ -24,7 +23,7 @@ import (
 const (
 	issueIndexerAnalyzer      = "issueIndexer"
 	issueIndexerDocType       = "issueIndexerDocType"
-	issueIndexerLatestVersion = 5
+	issueIndexerLatestVersion = 6
 )
 
 const unicodeNormalizeName = "unicodeNormalize"
@@ -100,7 +99,7 @@ func generateIssueIndexMapping() (mapping.IndexMapping, error) {
 		"type":          custom.Name,
 		"char_filters":  []string{},
 		"tokenizer":     unicode.Name,
-		"token_filters": []string{unicodeNormalizeName, camelcase.Name, lowercase.Name},
+		"token_filters": []string{unicodeNormalizeName, lowercase.Name},
 	}); err != nil {
 		return nil, err
 	}
diff --git a/modules/indexer/issues/indexer_test.go b/modules/indexer/issues/indexer_test.go
index 99a09380e7..3a913d8e79 100644
--- a/modules/indexer/issues/indexer_test.go
+++ b/modules/indexer/issues/indexer_test.go
@@ -53,6 +53,13 @@ func searchIssueWithKeyword(t *testing.T) {
 			},
 			[]int64{2},
 		},
+		{
+			"ISSUe2", // case-insensitive search
+			&SearchOptions{
+				RepoIDs: []int64{1},
+			},
+			[]int64{2},
+		},
 		{
 			"first",
 			&SearchOptions{