From 67a48bbec7f7a276715b94ffb0975aff14cb6733 Mon Sep 17 00:00:00 2001
From: Elian Doran <contact@eliandoran.me>
Date: Sat, 11 Apr 2026 14:14:18 +0300
Subject: [PATCH] fix(sidebar): duplicate equations rendering

---
 apps/client/src/widgets/react/hooks.tsx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/apps/client/src/widgets/react/hooks.tsx b/apps/client/src/widgets/react/hooks.tsx
index 3c60aed206..945bad29e5 100644
--- a/apps/client/src/widgets/react/hooks.tsx
+++ b/apps/client/src/widgets/react/hooks.tsx
@@ -1450,6 +1450,9 @@ export function useMathRendering(containerRef: RefObject<HTMLElement>, deps: unk
         const mathElements = containerRef.current.querySelectorAll(".math-tex");
 
         for (const mathEl of mathElements) {
+            // Skip if already rendered by KaTeX
+            if (mathEl.querySelector(".katex")) continue;
+
             try {
                 math.render(mathEl.textContent || "", mathEl as HTMLElement);
             } catch (e) {