diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 98491a8992..31127e6326 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -582,6 +582,7 @@ function undoReact(): void {
 }
 
 function toggleReact() {
+	console.log('toggleReact', $appearNote.myReaction);
 	if ($appearNote.myReaction == null) {
 		react();
 	} else {
diff --git a/packages/frontend/src/composables/use-note-capture.ts b/packages/frontend/src/composables/use-note-capture.ts
index 7d1e75fc04..707827e997 100644
--- a/packages/frontend/src/composables/use-note-capture.ts
+++ b/packages/frontend/src/composables/use-note-capture.ts
@@ -214,15 +214,15 @@ export function useNoteCapture(props: {
 	noteEvents.on(`unreacted:${note.id}`, onUnreacted);
 	noteEvents.on(`pollVoted:${note.id}`, onPollVoted);
 
-	let latestReactedKey: string | null = null;
-	let latestUnreactedKey: string | null = null;
+	// 操作がダブっていないかどうかを簡易的に記録するためのMap
+	const reactionUserMap = new Map<Misskey.entities.User['id'], string>();
 	let latestPollVotedKey: string | null = null;
 
 	function onReacted(ctx: { userId: Misskey.entities.User['id']; reaction: string; emoji?: { name: string; url: string; }; }): void {
 		const normalizedName = ctx.reaction.replace(/^:(\w+):$/, ':$1@.:');
-		const newReactedKey = `${ctx.userId}:${normalizedName}`;
-		if (newReactedKey === latestReactedKey) return;
-		latestReactedKey = newReactedKey;
+
+		if (reactionUserMap.has(ctx.userId) && reactionUserMap.get(ctx.userId) === normalizedName) return;
+		reactionUserMap.set(ctx.userId, normalizedName);
 
 		if (ctx.emoji && !(ctx.emoji.name in $note.reactionEmojis)) {
 			$note.reactionEmojis[ctx.emoji.name] = ctx.emoji.url;
@@ -240,9 +240,9 @@ export function useNoteCapture(props: {
 
 	function onUnreacted(ctx: { userId: Misskey.entities.User['id']; reaction: string; emoji?: { name: string; url: string; }; }): void {
 		const normalizedName = ctx.reaction.replace(/^:(\w+):$/, ':$1@.:');
-		const newUnreactedKey = `${ctx.userId}:${normalizedName}`;
-		if (newUnreactedKey === latestUnreactedKey) return;
-		latestUnreactedKey = newUnreactedKey;
+
+		if (!reactionUserMap.has(ctx.userId)) return;
+		reactionUserMap.delete(ctx.userId);
 
 		const currentCount = $note.reactions[normalizedName] || 0;