diff --git a/app/src/protyle/wysiwyg/index.ts b/app/src/protyle/wysiwyg/index.ts
index 907e837950b..4913f58ae05 100644
--- a/app/src/protyle/wysiwyg/index.ts
+++ b/app/src/protyle/wysiwyg/index.ts
@@ -2091,7 +2091,7 @@ export class WYSIWYG {
             ) {
                 // 搜狗输入法不走 keydown，需重新记录历史状态
                 if (range.toString() === "" &&  // windows 下回车新建块输入abc，选中 bc ctrl+m 后光标错误
-                    !this.preventKeyup &&
+                    (!this.preventKeyup || event.code === "Space") &&
                     nodeElement && typeof protyle.wysiwyg.lastHTMLs[nodeElement.getAttribute("data-node-id")] === "undefined") {
                     range.insertNode(document.createElement("wbr"));
                     protyle.wysiwyg.lastHTMLs[nodeElement.getAttribute("data-node-id")] = nodeElement.outerHTML;
diff --git a/app/src/protyle/wysiwyg/keydown.ts b/app/src/protyle/wysiwyg/keydown.ts
index c1f85726c07..6524bcd02ad 100644
--- a/app/src/protyle/wysiwyg/keydown.ts
+++ b/app/src/protyle/wysiwyg/keydown.ts
@@ -166,8 +166,7 @@ export const keydown = (protyle: IProtyle, editorElement: HTMLElement) => {
         // 有可能输入 shift+. ，因此需要使用 event.key 来进行判断
         if (event.key !== "PageUp" && event.key !== "PageDown" && event.key !== "Home" && event.key !== "End" && event.key.indexOf("Arrow") === -1 &&
             event.key !== "Escape" && event.key !== "Shift" && event.key !== "Meta" && event.key !== "Alt" && event.key !== "Control" && event.key !== "CapsLock" &&
-            !isNotEditBlock(nodeElement) &&
-            !/^F\d{1,2}$/.test(event.key) && typeof protyle.wysiwyg.lastHTMLs[nodeElement.getAttribute("data-node-id")] === "undefined") {
+            !isNotEditBlock(nodeElement) && !/^F\d{1,2}$/.test(event.key)) {
             const cloneRange = range.cloneRange();
             range.insertNode(document.createElement("wbr"));
             protyle.wysiwyg.lastHTMLs[nodeElement.getAttribute("data-node-id")] = nodeElement.outerHTML;