diff --git a/src/shared/markdown.ts b/src/shared/markdown.ts
index 5db10dc8..36e49d17 100644
--- a/src/shared/markdown.ts
+++ b/src/shared/markdown.ts
@@ -252,6 +252,7 @@ export function setupEmojiDataModel(custom_emoji_views: CustomEmojiView[]) {
     custom_emoji_views,
     x => x.custom_emoji.category,
   );
+  customEmojis.length = 0;
   for (const [category, emojis] of Object.entries(groupedEmojis)) {
     customEmojis.push({
       id: category,