diff --git a/docs/architecture/xtream-portal-compatibility.md b/docs/architecture/xtream-portal-compatibility.md
index c4acb36e7..ec1f7b5e8 100644
--- a/docs/architecture/xtream-portal-compatibility.md
+++ b/docs/architecture/xtream-portal-compatibility.md
@@ -89,8 +89,12 @@ supports these catch-up variants:
    with optional `extension=ts` or `extension=m3u8`.
 
 Electron probes concrete catch-up variants before caching a playlist-level
-choice. The probe uses a short range `GET`, follows only validated redirects,
-and accepts only `200` or `206` as playable. MPEG-TS is preferred before HLS
-when the provider allows it because some portals return a valid HLS manifest
-while the first media segment fails in Chromium/video.js. PWA fallback keeps the
-REST MPEG-TS URL when no Electron probe API is available.
+choice. The cache key includes the playlist id and the normalized
+`allowed_output_formats` advertised by the provider, so a catch-up variant
+detected before account capabilities are known cannot force stale MPEG-TS URLs
+after the portal later reports HLS-only playback. The probe uses a short range
+`GET`, follows only validated redirects, and accepts only `200` or `206` as
+playable. MPEG-TS is preferred before HLS when the provider allows it because
+some portals return a valid HLS manifest while the first media segment fails in
+Chromium/video.js. PWA fallback keeps the REST MPEG-TS URL when no Electron
+probe API is available.
diff --git a/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.spec.ts b/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.spec.ts
index 405926b5e..c1f837f94 100644
--- a/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.spec.ts
+++ b/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.spec.ts
@@ -188,11 +188,57 @@ describe('XtreamUrlService', () => {
         expect(secondUrl).toBe(firstUrl);
         expect(xtreamProbeUrl).toHaveBeenCalledTimes(2);
         expect(databaseService.setAppState).toHaveBeenCalledWith(
-            'xtream-catchup-variant:v3:playlist-1',
+            'xtream-catchup-variant:v4:playlist-1:formats:ts',
             'legacy:ts'
         );
     });
 
+    it('redetects catchup variants when provider output formats become known', async () => {
+        const xtreamProbeUrl = jest.fn(async (url: string) => ({
+            status:
+                url.includes('/streaming/timeshift.php?') &&
+                url.includes('extension=ts')
+                    ? 206
+                    : url.includes('/streaming/timeshift.php?') &&
+                        url.includes('extension=m3u8')
+                      ? 200
+                      : 0,
+        }));
+        window.electron = {
+            xtreamProbeUrl,
+        } as typeof window.electron;
+
+        const initialUrl = await service.resolveCatchupUrl(
+            'playlist-format-refresh',
+            credentials,
+            101,
+            1775296800,
+            1775300400
+        );
+        const refreshedUrl = await service.resolveCatchupUrl(
+            'playlist-format-refresh',
+            {
+                ...credentials,
+                allowedOutputFormats: ['m3u8'],
+            },
+            101,
+            1775296800,
+            1775300400
+        );
+
+        expect(initialUrl).toContain('extension=ts');
+        expect(refreshedUrl).toContain('extension=m3u8');
+        expect(xtreamProbeUrl).toHaveBeenCalledTimes(4);
+        expect(databaseService.setAppState).toHaveBeenCalledWith(
+            'xtream-catchup-variant:v4:playlist-format-refresh:formats:unknown',
+            'legacy:ts'
+        );
+        expect(databaseService.setAppState).toHaveBeenCalledWith(
+            'xtream-catchup-variant:v4:playlist-format-refresh:formats:m3u8',
+            'legacy:m3u8'
+        );
+    });
+
     it('prefers playable legacy MPEG-TS catchup before HLS for video.js compatible playlists', async () => {
         const xtreamProbeUrl = jest.fn(async (url: string) => ({
             status:
@@ -227,7 +273,7 @@ describe('XtreamUrlService', () => {
             'GET'
         );
         expect(databaseService.setAppState).toHaveBeenCalledWith(
-            'xtream-catchup-variant:v3:playlist-hls',
+            'xtream-catchup-variant:v4:playlist-hls:formats:m3u8,ts',
             'legacy:ts'
         );
     });
@@ -259,7 +305,7 @@ describe('XtreamUrlService', () => {
         expect(catchupUrl).toContain('/streaming/timeshift.php?');
         expect(catchupUrl).toContain('extension=m3u8');
         expect(databaseService.setAppState).toHaveBeenCalledWith(
-            'xtream-catchup-variant:v3:playlist-hls-only',
+            'xtream-catchup-variant:v4:playlist-hls-only:formats:m3u8,ts',
             'legacy:m3u8'
         );
     });
diff --git a/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.ts b/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.ts
index 53dfcf868..8aa9c49b3 100644
--- a/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.ts
+++ b/libs/portal/xtream/data-access/src/lib/services/xtream-url.service.ts
@@ -74,7 +74,7 @@ type XtreamProbeApi = {
     ) => Promise<{ status: number }>;
 };
 
-const XTREAM_CATCHUP_VARIANT_KEY_PREFIX = 'xtream-catchup-variant:v3:';
+const XTREAM_CATCHUP_VARIANT_KEY_PREFIX = 'xtream-catchup-variant:v4:';
 
 /**
  * Service for constructing Xtream stream URLs.
@@ -230,7 +230,10 @@ export class XtreamUrlService {
         stopTimestamp: number,
         serverTimezone?: string
     ): Promise<XtreamCatchupVariant> {
-        const cacheKey = `${XTREAM_CATCHUP_VARIANT_KEY_PREFIX}${playlistId}`;
+        const cacheKey = this.getCatchupVariantCacheKey(
+            playlistId,
+            credentials
+        );
         const cached = this.catchupSchemeCache.get(cacheKey);
         if (cached) {
             return this.normalizeCatchupVariant(cached);
@@ -348,9 +351,8 @@ export class XtreamUrlService {
     private getPreferredCatchupExtensions(
         credentials: XtreamCredentials
     ): XtreamCatchupExtension[] {
-        const allowedFormats = credentials.allowedOutputFormats
-            ?.map((format) => format.trim().toLowerCase())
-            .filter(Boolean);
+        const allowedFormats =
+            this.getNormalizedAllowedOutputFormats(credentials);
         const formats =
             allowedFormats && allowedFormats.length > 0
                 ? allowedFormats
@@ -369,6 +371,35 @@ export class XtreamUrlService {
             : [XTREAM_CATCHUP_EXTENSIONS.TS];
     }
 
+    private getCatchupVariantCacheKey(
+        playlistId: string,
+        credentials: XtreamCredentials
+    ): string {
+        const allowedFormats =
+            this.getNormalizedAllowedOutputFormats(credentials);
+        const formatSignature =
+            allowedFormats && allowedFormats.length > 0
+                ? [...new Set(allowedFormats)]
+                      .sort()
+                      .map((format) => encodeURIComponent(format))
+                      .join(',')
+                : 'unknown';
+
+        return `${XTREAM_CATCHUP_VARIANT_KEY_PREFIX}${playlistId}:formats:${formatSignature}`;
+    }
+
+    private getNormalizedAllowedOutputFormats(
+        credentials: XtreamCredentials
+    ): string[] | undefined {
+        const allowedFormats = credentials.allowedOutputFormats
+            ?.map((format) => format.trim().toLowerCase())
+            .filter(Boolean);
+
+        return allowedFormats && allowedFormats.length > 0
+            ? allowedFormats
+            : undefined;
+    }
+
     private normalizeCatchupVariant(
         scheme: XtreamCatchupScheme | XtreamCatchupVariant
     ): XtreamCatchupVariant {
@@ -436,9 +467,8 @@ export class XtreamUrlService {
         requestedFormat: string
     ): string {
         const requested = requestedFormat.trim().toLowerCase();
-        const allowedFormats = credentials.allowedOutputFormats
-            ?.map((format) => format.trim().toLowerCase())
-            .filter(Boolean);
+        const allowedFormats =
+            this.getNormalizedAllowedOutputFormats(credentials);
 
         if (!requested || requested === StreamFormat.AutoStreamFormat) {
             return this.resolveAutoLiveStreamFormat(allowedFormats);