diff --git a/app/src/protyle/render/mathRender.ts b/app/src/protyle/render/mathRender.ts
index fcb660a2d..d8ccd3454 100644
--- a/app/src/protyle/render/mathRender.ts
+++ b/app/src/protyle/render/mathRender.ts
@@ -47,7 +47,7 @@ export const mathRender = (element: Element, cdn = Constants.PROTYLE_CDN, maxWid
                     if (mathElement.tagName === "DIV") {
                         renderElement.firstElementChild.setAttribute("contenteditable", "false");
                         if (renderElement.childElementCount < 2) {
-                            renderElement.insertAdjacentHTML("beforeend", `<span style="position: absolute">${Constants.ZWSP}</span>`);
+                            renderElement.insertAdjacentHTML("beforeend", `<span contenteditable="false" style="position: absolute">${Constants.ZWSP}</span>`);
                         }
                         // https://github.com/siyuan-note/siyuan/issues/3541
                         const baseElements = renderElement.querySelectorAll(".base");