diff --git a/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.html b/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.html
index 8c02ea4ce..a6ed172f9 100644
--- a/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.html
+++ b/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.html
@@ -7,7 +7,7 @@
         [posterUrl]="serial.info.movie_image"
         [backdropUrl]="serial.info.tmdb_backdrop"
         [trailerBackdropUrl]="heroPresenter.trailerBackdropUrl()"
-        [contentKey]="'stalker-series:' + serial.id"
+        [contentKey]="'stalker-series:' + currentSeriesKey()"
         [playbackActive]="!!inlinePlayback()"
         (backClicked)="goBack()"
         (closePlayerRequested)="closeInlinePlayer()"
diff --git a/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.ts b/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.ts
index d0c9219ec..5186b2f13 100644
--- a/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.ts
+++ b/libs/portal/stalker/feature/src/lib/stalker-series-view/stalker-series-view.component.ts
@@ -284,10 +284,16 @@ export class StalkerSeriesViewComponent implements OnDestroy {
     readonly openingEpisodeId = signal<number | null>(null);
     readonly activeEpisodeId = signal<number | null>(null);
     /**
-     * Series ids of starts still resolving their stream (`create_link`
-     * round trips): only the series on screen counts as starting.
+     * `playlist:series` keys of starts still resolving their stream
+     * (`create_link` round trips): only the series on screen counts as
+     * starting. Provider series ids are playlist-scoped.
      */
     private readonly pendingStartSeriesIds = signal<readonly string[]>([]);
+    /** `playlist:series` of the series on screen; provider ids collide across playlists. */
+    readonly currentSeriesKey = computed(
+        () =>
+            `${this.stalkerStore.currentPlaylist()?._id ?? ''}:${this.displayItem()?.id ?? ''}`
+    );
     readonly seasonWatchBatchRunning = signal(false);
 
     /**
@@ -405,7 +411,7 @@ export class StalkerSeriesViewComponent implements OnDestroy {
             playbackActive: computed(
                 () =>
                     this.pendingStartSeriesIds().includes(
-                        String(this.displayItem()?.id ?? '')
+                        this.currentSeriesKey()
                     ) ||
                     this.inlinePlayback() !== null ||
                     this.openingEpisodeId() !== null ||
@@ -1286,7 +1292,7 @@ export class StalkerSeriesViewComponent implements OnDestroy {
         };
         if (request.usesEmbeddedPlayer && !request.identity) return;
 
-        const pendingSeriesId = String(this.displayItem()?.id ?? '');
+        const pendingSeriesId = this.currentSeriesKey();
         this.pendingStartSeriesIds.update((ids) => [...ids, pendingSeriesId]);
         try {
             const playback = await this.stalkerStore.resolveVodPlayback(
diff --git a/libs/portal/xtream/feature/src/lib/serial-details/serial-details.component.html b/libs/portal/xtream/feature/src/lib/serial-details/serial-details.component.html
index 6300c3a4c..ccd18aa9c 100644
--- a/libs/portal/xtream/feature/src/lib/serial-details/serial-details.component.html
+++ b/libs/portal/xtream/feature/src/lib/serial-details/serial-details.component.html
@@ -9,7 +9,9 @@
         [posterUrl]="info.cover"
         [backdropUrl]="getBackdropUrl(info)"
         [trailerBackdropUrl]="heroPresenter.trailerBackdropUrl()"
-        [contentKey]="'xtream-series:' + item.series_id"
+        [contentKey]="
+            'xtream-series:' + currentPlaylistId() + ':' + item.series_id
+        "
         [playbackActive]="!!inlinePlayback()"
         (backClicked)="goBack()"
         (closePlayerRequested)="closeInlinePlayer()"
diff --git a/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.html b/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.html
index b2a432df1..77b004f57 100644
--- a/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.html
+++ b/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.html
@@ -241,7 +241,7 @@
         [backdropUrl]="getBackdropUrl(info)"
         [progress]="hero.progress()"
         [trailerBackdropUrl]="trailerBackdropUrl()"
-        [contentKey]="'xtream-vod:' + selectedVodId()"
+        [contentKey]="contentKey()"
         [playbackActive]="!!inlinePlayback()"
         (backClicked)="goBack()"
         (closePlayerRequested)="closeInlinePlayer()"
diff --git a/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.ts b/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.ts
index 244131fc4..4fbdb3128 100644
--- a/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.ts
+++ b/libs/portal/xtream/feature/src/lib/vod-details/vod-details-route.component.ts
@@ -381,6 +381,11 @@ export class VodDetailsRouteComponent implements OnInit, OnDestroy {
     readonly trailerEmbedUrl = computed(() =>
         youtubeEmbedUrl(this.selectedVodInfo()?.youtube_trailer)
     );
+    /** `playlist:vod`: the hero keys its one-time layout decision on it. */
+    readonly contentKey = computed(
+        () =>
+            `xtream-vod:${this.xtreamStore.currentPlaylist()?.id ?? ''}:${this.selectedVodId()}`
+    );
     /** Settings → Playback → Play trailers in details background. */
     readonly trailerBackdropUrl = computed(() =>
         this.settingsStore.detailTrailerBackdrop?.() === true