diff --git a/src/index.tsx b/src/index.tsx
index 31f392a1d..c78f5415f 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -13,13 +13,11 @@ if (sentryDsn) {
     dsn: sentryDsn,
     environment: import.meta.env.MODE,
     release: import.meta.env.VITE_APP_VERSION,
-    integrations: [
-      Sentry.browserTracingIntegration(),
-    ],
-    // Only trace requests to our own Matrix homeserver
-    tracePropagationTargets: ['localhost', /^https:\/\/matrix\.lotusguild\.org/],
-    // 5% of transactions — enough signal without burning quota
-    tracesSampleRate: 0.05,
+    // browserTracingIntegration omitted — it injects sentry-trace/baggage headers
+    // into outgoing fetch calls, which breaks Synapse CORS on matrix.lotusguild.org
+    // No propagation targets — we don't control the Matrix server's CORS allow-list
+    tracePropagationTargets: [],
+    tracesSampleRate: 0,
     // Don't send PII (IPs, usernames) — this is a private chat app
     sendDefaultPii: false,
     // Forward Sentry logs to the dashboard