diff --git a/models/issue.go b/models/issue.go
index 82bd21455b2f..ee75623f5302 100644
--- a/models/issue.go
+++ b/models/issue.go
@@ -549,6 +549,11 @@ func (issue *Issue) ReplaceLabels(labels []*Label, doer *User) (err error) {
 		}
 	}
 
+	issue.Labels = nil
+	if err = issue.loadLabels(sess); err != nil {
+		return err
+	}
+
 	return sess.Commit()
 }
 
diff --git a/models/issue_label.go b/models/issue_label.go
index 2b519ee71deb..6b029198fcec 100644
--- a/models/issue_label.go
+++ b/models/issue_label.go
@@ -670,6 +670,11 @@ func NewIssueLabel(issue *Issue, label *Label, doer *User) (err error) {
 		return err
 	}
 
+	issue.Labels = nil
+	if err = issue.loadLabels(sess); err != nil {
+		return err
+	}
+
 	return sess.Commit()
 }
 
@@ -699,6 +704,11 @@ func NewIssueLabels(issue *Issue, labels []*Label, doer *User) (err error) {
 		return err
 	}
 
+	issue.Labels = nil
+	if err = issue.loadLabels(sess); err != nil {
+		return err
+	}
+
 	return sess.Commit()
 }
 
@@ -742,5 +752,10 @@ func DeleteIssueLabel(issue *Issue, label *Label, doer *User) (err error) {
 		return err
 	}
 
+	issue.Labels = nil
+	if err = issue.loadLabels(sess); err != nil {
+		return err
+	}
+
 	return sess.Commit()
 }