diff --git a/kernel/model/blockinfo.go b/kernel/model/blockinfo.go
index b5412b8a4..8ab656936 100644
--- a/kernel/model/blockinfo.go
+++ b/kernel/model/blockinfo.go
@@ -280,6 +280,10 @@ func buildBlockBreadcrumb(node *ast.Node) (ret []*BlockPath) {
 			if ast.NodeSuperBlock == prev.Type {
 				// 超级块中包含标题块时下方块面包屑计算不正确 https://github.com/siyuan-note/siyuan/issues/6675
 				b = treenode.SuperBlockLastHeading(prev)
+				if nil == b {
+					// 超级块下方块被作为嵌入块时设置显示面包屑后不渲染 https://github.com/siyuan-note/siyuan/issues/6690
+					b = prev
+				}
 			}
 
 			if ast.NodeHeading == b.Type && headingLevel > b.HeadingLevel {
diff --git a/kernel/model/repository.go b/kernel/model/repository.go
index 9ff57f12f..00a07e35b 100644
--- a/kernel/model/repository.go
+++ b/kernel/model/repository.go
@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"crypto/rand"
 	"crypto/sha256"
-	"crypto/tls"
 	"encoding/base64"
 	"errors"
 	"fmt"
@@ -824,7 +823,7 @@ func newRepository() (ret *dejavu.Repo, err error) {
 	case conf.ProviderSiYuan:
 		cloudRepo = cloud.NewSiYuan(&cloud.BaseCloud{Conf: cloudConf})
 	case conf.ProviderS3:
-		s3HTTPClient := &http.Client{Transport: &http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: cloudConf.S3.SkipTlsVerify}}}
+		s3HTTPClient := &http.Client{Transport: util.NewTransport(cloudConf.S3.SkipTlsVerify)}
 		s3HTTPClient.Timeout = 30 * time.Second
 		cloudRepo = cloud.NewS3(&cloud.BaseCloud{Conf: cloudConf}, s3HTTPClient)
 	case conf.ProviderWebDAV:
@@ -834,7 +833,7 @@ func newRepository() (ret *dejavu.Repo, err error) {
 		webdavClient.SetHeader("Authorization", auth)
 		webdavClient.SetHeader("User-Agent", util.UserAgent)
 		webdavClient.SetTimeout(30 * time.Second)
-		webdavClient.SetTransport(&http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: cloudConf.WebDAV.SkipTlsVerify}})
+		webdavClient.SetTransport(util.NewTransport(cloudConf.WebDAV.SkipTlsVerify))
 		cloudRepo = cloud.NewWebDAV(&cloud.BaseCloud{Conf: cloudConf}, webdavClient)
 	default:
 		err = fmt.Errorf("unknown cloud provider [%d]", Conf.Sync.Provider)
diff --git a/kernel/util/web.go b/kernel/util/net.go
similarity index 67%
rename from kernel/util/web.go
rename to kernel/util/net.go
index 7fc757c2e..e836ddebc 100644
--- a/kernel/util/web.go
+++ b/kernel/util/net.go
@@ -17,7 +17,12 @@
 package util
 
 import (
+	"context"
+	"crypto/tls"
+	"net"
+	"net/http"
 	"strings"
+	"time"
 
 	"github.com/88250/gulu"
 	"github.com/gin-gonic/gin"
@@ -48,3 +53,23 @@ func JsonArg(c *gin.Context, result *gulu.Result) (arg map[string]interface{}, o
 	ok = true
 	return
 }
+
+func NewTransport(skipTlsVerify bool) *http.Transport {
+	return &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		DialContext: defaultTransportDialContext(&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+		}),
+		ForceAttemptHTTP2:     true,
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: skipTlsVerify}}
+}
+
+func defaultTransportDialContext(dialer *net.Dialer) func(context.Context, string, string) (net.Conn, error) {
+	return dialer.DialContext
+}