diff --git a/kernel/main.go b/kernel/main.go
index 20c1a98f9..ff84ace50 100644
--- a/kernel/main.go
+++ b/kernel/main.go
@@ -39,7 +39,7 @@ func main() {
 
 	model.BootSyncData()
 	model.InitBoxes()
-	model.InitFlashcards()
+	model.LoadFlashcards()
 	model.LoadAssetsTexts()
 
 	go model.AutoGenerateDocHistory()
diff --git a/kernel/mobile/kernel.go b/kernel/mobile/kernel.go
index fa3ef2690..a5feb8438 100644
--- a/kernel/mobile/kernel.go
+++ b/kernel/mobile/kernel.go
@@ -53,7 +53,7 @@ func StartKernel(container, appDir, workspaceBaseDir, timezoneID, localIPs, lang
 
 		model.BootSyncData()
 		model.InitBoxes()
-		model.InitFlashcards()
+		model.LoadFlashcards()
 		model.LoadAssetsTexts()
 
 		go model.AutoGenerateDocHistory()
diff --git a/kernel/model/assets.go b/kernel/model/assets.go
index 50213850a..74139a08e 100644
--- a/kernel/model/assets.go
+++ b/kernel/model/assets.go
@@ -176,7 +176,7 @@ func NetImg2LocalAssets(rootID string) (err error) {
 					}
 				}
 				name = strings.TrimSuffix(name, ext)
-				name = gulu.Str.SubStr(name, 63) // 插入资源文件时文件名长度最大限制 189 字节 https://github.com/siyuan-note/siyuan/issues/7099
+				name = gulu.Str.SubStr(name, 63) // 插入资源文件时文件名长度最大限制 63 个字 https://github.com/siyuan-note/siyuan/issues/7099
 				name = util.FilterFileName(name)
 				name = "net-img-" + name + "-" + ast.NewNodeID() + ext
 				writePath := filepath.Join(assetsDirPath, name)
diff --git a/kernel/model/box.go b/kernel/model/box.go
index a7d93f571..a90fb5677 100644
--- a/kernel/model/box.go
+++ b/kernel/model/box.go
@@ -523,7 +523,7 @@ func FullReindex() {
 	}
 	IndexRefs()
 	treenode.SaveBlockTree(true)
-	InitFlashcards()
+	LoadFlashcards()
 
 	util.PushEndlessProgress(Conf.Language(58))
 	isFullReindexing = false
diff --git a/kernel/model/flashcard.go b/kernel/model/flashcard.go
index b782f6eb9..bd83bead1 100644
--- a/kernel/model/flashcard.go
+++ b/kernel/model/flashcard.go
@@ -359,7 +359,7 @@ func AddFlashcards(deckID string, blockIDs []string) (err error) {
 	return
 }
 
-func InitFlashcards() {
+func LoadFlashcards() {
 	riffSavePath := getRiffDir()
 	if err := os.MkdirAll(riffSavePath, 0755); nil != err {
 		logging.LogErrorf("create riff dir [%s] failed: %s", riffSavePath, err)
@@ -445,7 +445,7 @@ func RemoveDeck(deckID string) (err error) {
 		}
 	}
 
-	InitFlashcards()
+	LoadFlashcards()
 	return
 }
 
diff --git a/kernel/model/repository.go b/kernel/model/repository.go
index dc1170b30..767fb2489 100644
--- a/kernel/model/repository.go
+++ b/kernel/model/repository.go
@@ -501,6 +501,8 @@ func InitRepoKey() (err error) {
 	return
 }
 
+var isCheckoutRepo bool
+
 func CheckoutRepo(id string) (err error) {
 	if 1 > len(Conf.Repo.Key) {
 		err = errors.New(Conf.Language(26))
@@ -523,6 +525,16 @@ func CheckoutRepo(id string) (err error) {
 	Conf.Sync.Enabled = false
 	Conf.Save()
 
+	if util.IsMutexLocked(&syncLock) {
+		err = errors.New("sync is running, please try again later")
+		return
+	}
+
+	isCheckoutRepo = true
+	defer func() {
+		isCheckoutRepo = false
+	}()
+
 	_, _, err = repo.Checkout(id, map[string]interface{}{eventbus.CtxPushMsg: eventbus.CtxPushMsgToStatusBarAndProgress})
 	if nil != err {
 		util.PushClearProgress()
@@ -977,13 +989,17 @@ func syncRepo(exit, byHand bool) (err error) {
 	// 有数据变更，需要重建索引
 	var upserts, removes []string
 	var upsertTrees int
-	var needReloadFlashcard bool
+	var needReloadFlashcard, needReloadOcrTexts bool
 	for _, file := range mergeResult.Upserts {
 		upserts = append(upserts, file.Path)
 		if strings.HasPrefix(file.Path, "/storage/riff/") {
 			needReloadFlashcard = true
 		}
 
+		if strings.HasPrefix(file.Path, "/data/assets/ocr-texts.json") {
+			needReloadOcrTexts = true
+		}
+
 		if strings.HasSuffix(file.Path, ".sy") {
 			upsertTrees++
 		}
@@ -993,10 +1009,18 @@ func syncRepo(exit, byHand bool) (err error) {
 		if strings.HasPrefix(file.Path, "/storage/riff/") {
 			needReloadFlashcard = true
 		}
+
+		if strings.HasPrefix(file.Path, "/data/assets/ocr-texts.json") {
+			needReloadOcrTexts = true
+		}
 	}
 
 	if needReloadFlashcard {
-		InitFlashcards()
+		LoadFlashcards()
+	}
+
+	if needReloadOcrTexts {
+		LoadAssetsTexts()
 	}
 
 	cache.ClearDocsIAL()              // 同步后文档树文档图标没有更新 https://github.com/siyuan-note/siyuan/issues/4939
diff --git a/kernel/model/transaction.go b/kernel/model/transaction.go
index 96b2b2df2..17098e9a0 100644
--- a/kernel/model/transaction.go
+++ b/kernel/model/transaction.go
@@ -1244,6 +1244,11 @@ func autoFixIndex() {
 		return
 	}
 
+	if isCheckoutRepo {
+		logging.LogInfof("skip check index caused by checkout repo")
+		return
+	}
+
 	if util.IsMutexLocked(&autoFixLock) {
 		return
 	}
@@ -1286,6 +1291,12 @@ func autoFixIndex() {
 				break
 			}
 
+			id := path.Base(p)
+			id = strings.TrimSuffix(id, ".sy")
+			if !ast.IsNodeIDPattern(id) {
+				continue
+			}
+
 			reindexTreeByPath(box.ID, p, i, size)
 		}
 	}
diff --git a/kernel/sql/database.go b/kernel/sql/database.go
index a0e35aaa6..b11a12003 100644
--- a/kernel/sql/database.go
+++ b/kernel/sql/database.go
@@ -342,8 +342,7 @@ func buildRef(tree *parse.Tree, refNode *ast.Node) *Ref {
 }
 
 func buildEmbedRef(tree *parse.Tree, embedNode *ast.Node) *Ref {
-	markdown := treenode.ExportNodeStdMd(embedNode, luteEngine)
-	defBlockID, text := getEmbedRef(embedNode)
+	defBlockID := getEmbedRef(embedNode)
 	var defBlockParentID, defBlockRootID, defBlockPath string
 	defBlock := treenode.GetBlockTree(defBlockID)
 	if nil != defBlock {
@@ -362,19 +361,14 @@ func buildEmbedRef(tree *parse.Tree, embedNode *ast.Node) *Ref {
 		RootID:           tree.ID,
 		Box:              tree.Box,
 		Path:             tree.Path,
-		Content:          text,
-		Markdown:         markdown,
+		Content:          "",
+		Markdown:         "",
 		Type:             treenode.TypeAbbr(embedNode.Type.String()),
 	}
 }
 
-func getEmbedRef(embedNode *ast.Node) (queryBlockID, refText string) {
+func getEmbedRef(embedNode *ast.Node) (queryBlockID string) {
 	queryBlockID = treenode.GetEmbedBlockRef(embedNode)
-	if "" == queryBlockID {
-		return
-	}
-
-	refText = getRefText(queryBlockID)
 	return
 }
 
diff --git a/kernel/util/file.go b/kernel/util/file.go
index 61006a6c7..836a2ae2c 100644
--- a/kernel/util/file.go
+++ b/kernel/util/file.go
@@ -141,7 +141,7 @@ func FilterUploadFileName(name string) string {
 	ret = strings.ReplaceAll(ret, "#", "")
 	ret = strings.ReplaceAll(ret, "%", "")
 	ret = strings.ReplaceAll(ret, "$", "")
-	// 插入资源文件时文件名长度最大限制 189 字节 https://github.com/siyuan-note/siyuan/issues/7099
+	// 插入资源文件时文件名长度最大限制 63 个字 https://github.com/siyuan-note/siyuan/issues/7099
 	ret = gulu.Str.SubStr(ret, 63)
 	return ret
 }
diff --git a/kernel/util/string.go b/kernel/util/string.go
index d982cfcf6..569a4a0f4 100644
--- a/kernel/util/string.go
+++ b/kernel/util/string.go
@@ -17,7 +17,9 @@
 package util
 
 import (
+	"bytes"
 	"strings"
+	"unicode"
 
 	"github.com/88250/lute/html"
 )
@@ -39,3 +41,30 @@ func Reverse(s string) string {
 	}
 	return string(runes)
 }
+
+func RemoveRedundantSpace(str string) string {
+	buf := bytes.Buffer{}
+	lastIsChinese := false
+	lastIsSpace := false
+	for _, r := range str {
+		if unicode.IsSpace(r) {
+			if lastIsChinese || lastIsSpace {
+				continue
+			}
+			buf.WriteRune(' ')
+			lastIsChinese = false
+			lastIsSpace = true
+			continue
+		}
+
+		lastIsSpace = false
+		buf.WriteRune(r)
+		if unicode.Is(unicode.Han, r) {
+			lastIsChinese = true
+			continue
+		} else {
+			lastIsChinese = false
+		}
+	}
+	return buf.String()
+}
diff --git a/kernel/util/tesseract.go b/kernel/util/tesseract.go
index bc73ee200..04780bd83 100644
--- a/kernel/util/tesseract.go
+++ b/kernel/util/tesseract.go
@@ -23,7 +23,6 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
-	"regexp"
 	"strings"
 	"sync"
 	"time"
@@ -90,8 +89,7 @@ func Tesseract(imgAbsPath string) string {
 
 	ret := string(output)
 	ret = gulu.Str.RemoveInvisible(ret)
-	reg := regexp.MustCompile("\\s{2,}")
-	ret = reg.ReplaceAllString(ret, " ")
+	ret = RemoveRedundantSpace(ret)
 	msg := fmt.Sprintf("OCR [%s] [%s]", info.Name(), ret)
 	PushStatusBar(msg)
 	return ret