diff --git a/fruitshorts-app-api/src/test/java/com/fruitshorts/playback/service/WatchProgressServiceTest.java b/fruitshorts-app-api/src/test/java/com/fruitshorts/playback/service/WatchProgressServiceTest.java
index 5d9094e..35c2f26 100644
--- a/fruitshorts-app-api/src/test/java/com/fruitshorts/playback/service/WatchProgressServiceTest.java
+++ b/fruitshorts-app-api/src/test/java/com/fruitshorts/playback/service/WatchProgressServiceTest.java
@@ -32,9 +32,11 @@ import org.springframework.transaction.support.TransactionTemplate;
 import java.time.LocalDateTime;
 import java.lang.reflect.Method;
 import java.util.List;
+import java.util.Map;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
@@ -330,6 +332,72 @@ class WatchProgressServiceTest {
         verify(progressMapper).deleteById(1L);
     }
 
+    @Test
+    void should_delete_buffer_state_when_removing_or_clearing_history() {
+        WatchProgressBuffer buffer = mock(WatchProgressBuffer.class);
+        WatchProgressService service = serviceWithBuffer(buffer);
+
+        service.remove(new InteractionIdentity(9L, ""), 5L);
+        service.clear(new InteractionIdentity(9L, ""));
+
+        verify(buffer).remove(any(InteractionIdentity.class), eq(5L));
+        verify(buffer).clear(any(InteractionIdentity.class));
+        verify(progressMapper, times(2)).delete(any());
+    }
+
+    @Test
+    void should_not_bring_back_deleted_drama_from_buffer_in_recent_page() {
+        WatchProgressBuffer buffer = mock(WatchProgressBuffer.class);
+        WatchProgressService service = serviceWithBuffer(buffer);
+        Page<WatchProgress> emptyPage = new Page<>(1, 20, 0);
+        emptyPage.setRecords(List.of());
+        given(progressMapper.selectPage(any(Page.class), any())).willReturn(emptyPage);
+        given(buffer.getAll(any(InteractionIdentity.class))).willReturn(Map.of(
+                5L, new WatchProgressBuffer.BufferedProgress(
+                        5L, 88L, 1_000L, 2_000L, false, "feed", "", 1_700_000_000_000L)));
+        // 库里该剧只剩逻辑删除行：缓冲状态不得再把它读回列表
+        WatchProgress hidden = progress(5L, 88L);
+        hidden.setDeleted(1);
+        given(progressMapper.selectAnyForIdentityIn(9L, "", List.of(5L)))
+                .willReturn(List.of(hidden));
+
+        PageResult<ProgressRespVO> result =
+                service.recentPage(new InteractionIdentity(9L, ""), 1, 20);
+
+        assertThat(result.getList()).isEmpty();
+        assertThat(result.getTotal()).isZero();
+    }
+
+    @Test
+    void should_drop_buffered_refs_whose_state_is_gone_instead_of_requeue() {
+        WatchProgressBuffer buffer = mock(WatchProgressBuffer.class);
+        WatchProgressService service = serviceWithBuffer(buffer);
+        given(buffer.drain(10)).willReturn(
+                List.of(new WatchProgressBuffer.IdentityRef("u:9", 9L, "", 5L)));
+        given(buffer.getAllBatch(List.of("u:9"))).willReturn(Map.of());
+
+        int flushed = service.flushBuffered(10);
+
+        // 状态已消失（用户删除/清空历史或 TTL 过期）：必须丢弃，退回队列会变成永不消失的僵尸条目
+        assertThat(flushed).isZero();
+        verify(buffer, never()).requeue(any());
+        verify(progressMapper, never()).selectBatchForPairs(any());
+    }
+
+    private WatchProgressService serviceWithBuffer(WatchProgressBuffer buffer) {
+        @SuppressWarnings("unchecked")
+        ObjectProvider<WatchProgressBuffer> provider = mock(ObjectProvider.class);
+        given(provider.getIfAvailable()).willReturn(buffer);
+        return new WatchProgressService(
+                progressMapper,
+                historyMapper,
+                dramaService,
+                episodeService,
+                provider,
+                mock(SqlSessionFactory.class),
+                new TransactionTemplate(mock(PlatformTransactionManager.class)));
+    }
+
     private Drama drama(Long id, String title, int totalEpisodes) {
         Drama drama = new Drama();
         drama.setId(id);