From e14ab90551a1b17e05fcc324de9dfe4a561ee4d7 Mon Sep 17 00:00:00 2001
From: Henrik Giesel <hengiesel@gmail.com>
Date: Wed, 24 Nov 2021 01:25:24 +0100
Subject: [PATCH] Fix Cloze button (#1504)

---
 ts/editor/destroyable.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ts/editor/destroyable.ts b/ts/editor/destroyable.ts
index 19aa8c15a..60399d220 100644
--- a/ts/editor/destroyable.ts
+++ b/ts/editor/destroyable.ts
@@ -10,7 +10,7 @@ export function clearableArray<T>(): (T & Destroyable)[] {
 
     return new Proxy(list, {
         get: function (target: (T & Destroyable)[], prop: string | symbol) {
-            if (!isNaN(Number(prop)) && !target[prop]) {
+            if (!(typeof prop === "symbol") && !isNaN(Number(prop)) && !target[prop]) {
                 const item = {} as T & Destroyable;
 
                 const destroy = (): void => {