diff --git a/library/core/src/main/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManager.java b/library/core/src/main/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManager.java
index b3393b67fd5..0e3dd578d6e 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManager.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManager.java
@@ -380,15 +380,15 @@ public void maybeSetWindowSequenceNumber(
     }
 
     public boolean isFinishedAtEventTime(EventTime eventTime) {
-      if (windowSequenceNumber == C.INDEX_UNSET) {
-        // Sessions with unspecified window sequence number are kept until we know more.
-        return false;
-      }
       if (eventTime.mediaPeriodId == null) {
         // For event times without media period id (e.g. after seek to new window), we only keep
         // sessions of this window.
         return windowIndex != eventTime.windowIndex;
       }
+      if (windowSequenceNumber == C.INDEX_UNSET) {
+        // Sessions with unspecified window sequence number are kept until we know more.
+        return false;
+      }
       if (eventTime.mediaPeriodId.windowSequenceNumber > windowSequenceNumber) {
         // All past window sequence numbers are finished.
         return true;
diff --git a/library/core/src/test/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManagerTest.java b/library/core/src/test/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManagerTest.java
index 44aba86db3c..c9c3178255a 100644
--- a/library/core/src/test/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManagerTest.java
+++ b/library/core/src/test/java/com/google/android/exoplayer2/analytics/DefaultPlaybackSessionManagerTest.java
@@ -925,7 +925,8 @@ public void positionDiscontinuity_toNewWindow_withPeriodTransitionReason_finishe
   }
 
   @Test
-  public void positionDiscontinuity_toNewWindow_withSeekTransitionReason_finishesSession() {
+  public void
+      positionDiscontinuity_toNewWindow_withMediaPeriodIds_withSeekTransitionReason_finishesSession() {
     Timeline timeline = new FakeTimeline(/* windowCount= */ 2);
     EventTime eventTime1 =
         createEventTime(
@@ -957,6 +958,30 @@ public void positionDiscontinuity_toNewWindow_withSeekTransitionReason_finishesS
     verifyNoMoreInteractions(mockListener);
   }
 
+  @Test
+  public void
+      positionDiscontinuity_toNewWindow_withoutMediaPeriodIds_withSeekTransitionReason_finishesSession() {
+    Timeline timeline = new FakeTimeline(/* windowCount= */ 2);
+    EventTime eventTime1 =
+        createEventTime(timeline, /* windowIndex= */ 0, /* mediaPeriodId= */ null);
+    EventTime eventTime2 =
+        createEventTime(timeline, /* windowIndex= */ 1, /* mediaPeriodId= */ null);
+    sessionManager.updateSessionsWithTimelineChange(eventTime1);
+
+    sessionManager.updateSessionsWithDiscontinuity(eventTime2, Player.DISCONTINUITY_REASON_SEEK);
+
+    ArgumentCaptor<String> sessionId1 = ArgumentCaptor.forClass(String.class);
+    ArgumentCaptor<String> sessionId2 = ArgumentCaptor.forClass(String.class);
+    verify(mockListener).onSessionCreated(eq(eventTime1), sessionId1.capture());
+    verify(mockListener).onSessionActive(eventTime1, sessionId1.getValue());
+    verify(mockListener).onSessionCreated(eq(eventTime2), sessionId2.capture());
+    verify(mockListener)
+        .onSessionFinished(
+            eventTime2, sessionId1.getValue(), /* automaticTransitionToNextPlayback= */ false);
+    verify(mockListener).onSessionActive(eventTime2, sessionId2.getValue());
+    verifyNoMoreInteractions(mockListener);
+  }
+
   @Test
   public void positionDiscontinuity_toSameWindow_withoutMediaPeriodId_doesNotFinishSession() {
     Timeline timeline = new FakeTimeline();