diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9526f67760..bd249f8608 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,6 +25,8 @@
 - Fix: robots.txtの内容を調整
 - Fix: 特定のユーザーに管理者権限を持つロールが複数ついている際に、取得できるユーザーIDが重複する問題を修正  
   (Cherry-picked from https://github.com/lqvp/misskey-tempura/commit/17ed4108cec4b6bd2fd989db5a9091db91fa37a7)
+- Fix: ブロックしたサーバーからのInboxジョブが蓄積し続ける問題を修正  
+  (Cherry-picked from https://github.com/lqvp/misskey-tempura/commit/3f0f4bfe923f2b3a7837017b54841598f421c6ef)
 - Fix: support activity with `actor` as an id string or embedded object in inbox processor and ActivityPub inbox service
 - Fix: コンフィグファイルに `meilisearch` の設定がある状態でほかの検索プロバイダを利用すると、UI上からリモートのノートの検索ができない問題を修正
 
diff --git a/packages/backend/src/queue/processors/InboxProcessorService.ts b/packages/backend/src/queue/processors/InboxProcessorService.ts
index 98af3477a8..78261a096a 100644
--- a/packages/backend/src/queue/processors/InboxProcessorService.ts
+++ b/packages/backend/src/queue/processors/InboxProcessorService.ts
@@ -243,17 +243,17 @@ export class InboxProcessorService implements OnApplicationShutdown {
 			}
 		} catch (e) {
 			if (e instanceof IdentifiableError) {
-				if (e.id === '689ee33f-f97c-479a-ac49-1b9f8140af99') {
-					return 'blocked notes with prohibited words';
-				}
-				if (e.id === '85ab9bd7-3a41-4530-959d-f07073900109') {
-					return 'actor has been suspended';
-				}
-				if (e.id === 'd450b8a9-48e4-4dab-ae36-f4db763fda7c') { // invalid Note
-					return e.message;
-				}
-				if (e.id === '9f466dab-c856-48cd-9e65-ff90ff750580') {
-					return 'note contains too many mentions';
+				switch (e.id) {
+					case '689ee33f-f97c-479a-ac49-1b9f8140af99':
+						return 'blocked notes with prohibited words';
+					case '85ab9bd7-3a41-4530-959d-f07073900109':
+						return 'actor has been suspended';
+					case 'd450b8a9-48e4-4dab-ae36-f4db763fda7c': // invalid Note
+						return e.message;
+					case '9f466dab-c856-48cd-9e65-ff90ff750580':
+						return 'note contains too many mentions';
+					case '09d79f9e-64f1-4316-9cfa-e75c4d091574': // Instance is blocked
+						return 'skip: blocked instance';
 				}
 			}
 			throw e;