diff --git a/packages/backend/src/core/activitypub/ApInboxService.ts b/packages/backend/src/core/activitypub/ApInboxService.ts
index 9838e3bd3..ee3f691c5 100644
--- a/packages/backend/src/core/activitypub/ApInboxService.ts
+++ b/packages/backend/src/core/activitypub/ApInboxService.ts
@@ -130,7 +130,8 @@ export class ApInboxService {
 		if (actor.uri) {
 			if (actor.lastFetchedAt == null || Date.now() - actor.lastFetchedAt.getTime() > 1000 * 60 * 60 * 24) {
 				setImmediate(() => {
-					this.apPersonService.updatePerson(actor.uri, resolver);
+					// 同一ユーザーの情報を再度処理するので、使用済みのresolverを再利用してはいけない
+					this.apPersonService.updatePerson(actor.uri);
 				});
 			}
 		}
diff --git a/packages/backend/src/server/api/endpoints/ap/show.ts b/packages/backend/src/server/api/endpoints/ap/show.ts
index bf99834c1..24d5a7b0f 100644
--- a/packages/backend/src/server/api/endpoints/ap/show.ts
+++ b/packages/backend/src/server/api/endpoints/ap/show.ts
@@ -137,10 +137,11 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			if (local != null) return local;
 		}
 
+		// 同一ユーザーの情報を再度処理するので、使用済みのresolverを再利用してはいけない
 		return await this.mergePack(
 			me,
-			isActor(object) ? await this.apPersonService.createPerson(getApId(object), resolver) : null,
-			isPost(object) ? await this.apNoteService.createNote(getApId(object), undefined, resolver, true) : null,
+			isActor(object) ? await this.apPersonService.createPerson(getApId(object)) : null,
+			isPost(object) ? await this.apNoteService.createNote(getApId(object), undefined, undefined, true) : null,
 		);
 	}