diff --git a/app/src/mobile/settings/about.ts b/app/src/mobile/settings/about.ts
index 498a4018e..b88e96637 100644
--- a/app/src/mobile/settings/about.ts
+++ b/app/src/mobile/settings/about.ts
@@ -63,7 +63,7 @@ export const initAbout = () => {
 <div class="b3-label">
         ${window.siyuan.languages.about2}
         <div class="fn__hr"></div>
-        <a target="_blank" href="${"http://127.0.0.1:" + location.port}" class="b3-button b3-button--outline fn__block">
+        <a target="_blank" href="${"http://127.0.0.1:" + location.port}?openExternal" class="b3-button b3-button--outline fn__block">
             <svg><use xlink:href="#iconLink"></use></svg>${window.siyuan.languages.about4}
         </a>
         <div class="b3-label__text">${window.siyuan.languages.about3.replace("${port}", location.port)}</div>
diff --git a/kernel/filesys/tree.go b/kernel/filesys/tree.go
index fcbefbc74..bbd4c293a 100644
--- a/kernel/filesys/tree.go
+++ b/kernel/filesys/tree.go
@@ -252,7 +252,7 @@ func prepareWriteTree(tree *parse.Tree) (data []byte, filePath string, err error
 	tree.Root.SetIALAttr("type", "doc")
 	renderer := render.NewJSONRenderer(tree, luteEngine.RenderOptions, luteEngine.ParseOptions)
 	data = renderer.Render()
-	data = bytes.ReplaceAll(data, []byte(`\u0000`), []byte(""))
+	data = removeUnescapedUnicodeNull(data)
 	if !util.UseSingleLineSave {
 		buf := bytes.Buffer{}
 		buf.Grow(1024 * 1024 * 2)
@@ -269,6 +269,46 @@ func prepareWriteTree(tree *parse.Tree) (data []byte, filePath string, err error
 	return
 }
 
+// removeUnescapedUnicodeNull 只移除未被转义的 `\u0000` 字面序列。
+// 判断方法：在匹配到 `\u0000` 时向前数连续的 `\` 个数，若为偶数则视为未转义并移除。
+func removeUnescapedUnicodeNull(data []byte) []byte {
+	patLen := 6 // len(`\u0000`)
+	n := len(data)
+	if n < patLen {
+		return data
+	}
+
+	dst := make([]byte, 0, n)
+	i := 0
+	for i < n {
+		// 快速检查是否可能匹配 `\u0000`
+		if i+patLen <= n &&
+			data[i] == '\\' &&
+			data[i+1] == 'u' &&
+			data[i+2] == '0' &&
+			data[i+3] == '0' &&
+			data[i+4] == '0' &&
+			data[i+5] == '0' {
+			// 统计当前 `\` 之前连续的反斜杠数量
+			j := i - 1
+			backslashes := 0
+			for j >= 0 && data[j] == '\\' {
+				backslashes++
+				j--
+			}
+			// 若为偶数，则当前 `\` 未被转义，跳过整个 `\u0000`
+			if backslashes%2 == 0 {
+				i += patLen
+				continue
+			}
+		}
+		// 否则保留当前字节
+		dst = append(dst, data[i])
+		i++
+	}
+	return dst
+}
+
 func afterWriteTree(tree *parse.Tree) {
 	docIAL := parse.IAL2MapUnEsc(tree.Root.KramdownIAL)
 	cache.PutDocIAL(tree.Path, docIAL)
diff --git a/kernel/model/attribute_view.go b/kernel/model/attribute_view.go
index b1751a2d1..7a7e7ffca 100644
--- a/kernel/model/attribute_view.go
+++ b/kernel/model/attribute_view.go
@@ -3111,8 +3111,28 @@ func getKanbanPreferredGroupKey(attrView *av.AttributeView) (ret *av.Key) {
 			break
 		}
 	}
+
 	if nil == ret {
-		ret = attrView.GetBlockKey()
+		name := av.GetAttributeViewI18n("select")
+		ret = av.NewKey(ast.NewNodeID(), name, "", av.KeyTypeSelect)
+		attrView.KeyValues = append(attrView.KeyValues, &av.KeyValues{Key: ret})
+		for _, view := range attrView.Views {
+			newField := &av.BaseField{ID: ret.ID}
+			if nil != view.Table {
+				newField.Wrap = view.Table.WrapField
+				view.Table.Columns = append(view.Table.Columns, &av.ViewTableColumn{BaseField: newField})
+			}
+
+			if nil != view.Gallery {
+				newField.Wrap = view.Gallery.WrapField
+				view.Gallery.CardFields = append(view.Gallery.CardFields, &av.ViewGalleryCardField{BaseField: newField})
+			}
+
+			if nil != view.Kanban {
+				newField.Wrap = view.Kanban.WrapField
+				view.Kanban.Fields = append(view.Kanban.Fields, &av.ViewKanbanField{BaseField: newField})
+			}
+		}
 	}
 	return
 }