hang in load()

[falanjones]

In using this at scale I see a hang in load() around line 90.
I'm now testing a version that puts Update() after View():

func (s *Store) load(session *sessions.Session) (bool, error) {
	// exists represents whether a session data exists or not.
	var exists, expired bool
	id := []byte(session.ID)
	err := s.db.View(func(tx *bolt.Tx) error {
		bucket := tx.Bucket(s.config.DBOptions.BucketName)
		// Get the session data.
		data := bucket.Get(id)
		if data == nil {
			return nil
		}
		sessionData, err := shared.Session(data)
		if err != nil {
			return err
		}
		// Check the expiration of the session data.
		if shared.Expired(sessionData) {
			expired = true
		}
		exists = true
		dec := gob.NewDecoder(bytes.NewBuffer(sessionData.Values))
		return dec.Decode(&session.Values)
	})
	if expired {
		err := s.db.Update(func(txu *bolt.Tx) error {
			return txu.Bucket(s.config.DBOptions.BucketName).Delete(id)
		})
		return false, err
	}
	return exists, err
}