diff --git a/gpodder/tests.py b/gpodder/tests.py
new file mode 100644
index 0000000..2080c1c
--- /dev/null
+++ b/gpodder/tests.py
@@ -0,0 +1,36 @@
+import base64
+import json
+
+from django.contrib.auth.models import User
+from django.test import TestCase
+
+from podcasts.models import EpisodeProgress, PodcastEpisode, PodcastFeed
+
+
+class EpisodeActionTests(TestCase):
+    """Play positions from a gPodder client (AntennaPod sync) land on the user's own episode."""
+
+    def setUp(self):
+        self.alice = User.objects.create_user(username='alice', password='pw12345678')
+        bob = User.objects.create_user(username='bob', password='pw12345678')
+        url = 'https://example.org/feed'
+        audio = 'https://example.org/e1.mp3'
+        # Bob subscribed first: his copy of the episode has the lower id.
+        bobs_feed = PodcastFeed.objects.create(user=bob, rss_url=url, title='Feed')
+        self.bobs_ep = PodcastEpisode.objects.create(feed=bobs_feed, guid='e1', title='E1', audio_url=audio,
+                                                     duration_seconds=1000)
+        alices_feed = PodcastFeed.objects.create(user=self.alice, rss_url=url, title='Feed')
+        self.alices_ep = PodcastEpisode.objects.create(feed=alices_feed, guid='e1', title='E1', audio_url=audio,
+                                                       duration_seconds=1000)
+        self.auth = 'Basic ' + base64.b64encode(b'alice:pw12345678').decode()
+
+    def test_position_goes_to_own_episode(self):
+        actions = [{'podcast': 'https://example.org/feed', 'episode': 'https://example.org/e1.mp3',
+                    'action': 'play', 'position': 300, 'total': 1000}]
+        r = self.client.post('/api/2/episodes/alice.json', json.dumps(actions), content_type='application/json',
+                             HTTP_AUTHORIZATION=self.auth)
+        self.assertEqual(r.status_code, 200, r.content)
+        progress = EpisodeProgress.objects.get(user=self.alice)
+        self.assertEqual(progress.episode, self.alices_ep)
+        self.assertEqual(progress.position_seconds, 300)
+        self.assertFalse(EpisodeProgress.objects.filter(episode=self.bobs_ep).exists())
diff --git a/gpodder/views.py b/gpodder/views.py
index a4e3b79..913d64b 100644
--- a/gpodder/views.py
+++ b/gpodder/views.py
@@ -230,7 +230,8 @@ def episode_actions(request, username):
             # Sync playback position to EpisodeProgress
             if action == 'play' and a.get('position') is not None:
                 try:
-                    ep = PodcastEpisode.objects.filter(audio_url=episode_url).first()
+                    # Only this user's subscriptions: several users can have the same feed.
+                    ep = PodcastEpisode.objects.filter(audio_url=episode_url, feed__user=request.user).first()
                     if ep:
                         pos = int(a['position'])
                         dur = ep.duration_seconds or 0