diff --git a/models/issue_comment.go b/models/issue_comment.go
index 63f5f6b77..c7e9e7cdf 100644
--- a/models/issue_comment.go
+++ b/models/issue_comment.go
@@ -539,8 +539,10 @@ func createComment(e *xorm.Session, opts *CreateCommentOptions) (_ *Comment, err
 		return nil, err
 	}
 
-	if err = sendCreateCommentAction(e, opts, comment); err != nil {
-		return nil, err
+	if !opts.NoAction {
+		if err = sendCreateCommentAction(e, opts, comment); err != nil {
+			return nil, err
+		}
 	}
 
 	if err = comment.addCrossReferences(e, opts.Doer); err != nil {
@@ -816,6 +818,7 @@ type CreateCommentOptions struct {
 	RefCommentID     int64
 	RefAction        references.XRefAction
 	RefIsPull        bool
+	NoAction         bool
 }
 
 // CreateComment creates comment of issue or commit.
diff --git a/models/review.go b/models/review.go
index ede2ebd32..22a07f182 100644
--- a/models/review.go
+++ b/models/review.go
@@ -269,6 +269,13 @@ func SubmitReview(doer *User, issue *Issue, reviewType ReviewType, content strin
 			return nil, nil, err
 		}
 	} else {
+		if err := review.loadCodeComments(sess); err != nil {
+			return nil, nil, err
+		}
+		if len(review.CodeComments) == 0 && len(strings.TrimSpace(content)) == 0 {
+			return nil, nil, ContentEmptyErr{}
+		}
+
 		review.Issue = issue
 		review.Content = content
 		review.Type = reviewType
@@ -284,16 +291,13 @@ func SubmitReview(doer *User, issue *Issue, reviewType ReviewType, content strin
 		Issue:    issue,
 		Repo:     issue.Repo,
 		ReviewID: review.ID,
+		NoAction: true,
 	})
 	if err != nil || comm == nil {
 		return nil, nil, err
 	}
 
 	comm.Review = review
-
-	if err := updateIssueCols(sess, review.Issue, "updated_unix"); err != nil {
-		return nil, nil, err
-	}
 	return review, comm, sess.Commit()
 }
 
diff --git a/modules/notification/action/action.go b/modules/notification/action/action.go
index 6a81e6af8..05b859530 100644
--- a/modules/notification/action/action.go
+++ b/modules/notification/action/action.go
@@ -149,17 +149,19 @@ func (a *actionNotifier) NotifyPullRequestReview(pr *models.PullRequest, review
 		}
 	}
 
-	actions = append(actions, &models.Action{
-		ActUserID: review.Reviewer.ID,
-		ActUser:   review.Reviewer,
-		Content:   fmt.Sprintf("%d|%s", review.Issue.Index, strings.Split(content, "\n")[0]),
-		OpType:    models.ActionCommentIssue,
-		RepoID:    review.Issue.RepoID,
-		Repo:      review.Issue.Repo,
-		IsPrivate: review.Issue.Repo.IsPrivate,
-		Comment:   comment,
-		CommentID: comment.ID,
-	})
+	if strings.TrimSpace(comment.Content) != "" {
+		actions = append(actions, &models.Action{
+			ActUserID: review.Reviewer.ID,
+			ActUser:   review.Reviewer,
+			Content:   fmt.Sprintf("%d|%s", review.Issue.Index, strings.Split(content, "\n")[0]),
+			OpType:    models.ActionCommentIssue,
+			RepoID:    review.Issue.RepoID,
+			Repo:      review.Issue.Repo,
+			IsPrivate: review.Issue.Repo.IsPrivate,
+			Comment:   comment,
+			CommentID: comment.ID,
+		})
+	}
 
 	if err := models.NotifyWatchersActions(actions); err != nil {
 		log.Error("notify watchers '%d/%d': %v", review.Reviewer.ID, review.Issue.RepoID, err)