diff --git a/ts/reviewer/index.ts b/ts/reviewer/index.ts
index 297318221..7119ded42 100644
--- a/ts/reviewer/index.ts
+++ b/ts/reviewer/index.ts
@@ -92,6 +92,8 @@ async function _updateQA(
 
     const qa = document.getElementById("qa")!;
 
+    qa.style.opacity = "0";
+
     try {
         setInnerHTML(qa, html);
     } catch (error) {
@@ -110,6 +112,8 @@ async function _updateQA(
         })
         .catch(renderError("MathJax"));
 
+    qa.style.opacity = "1";
+
     await _runHook(onShownHook);
 }