i><li><p><strong>Fixed</strong> default retry policy to exclude retries on 503 which is potentially unsafe for idempotent requests.
This behavior can be temporarily reverted with <code>EXCLUDE_UNSAFE_503_FROM_DEFAULT_RETRY=false</code>.
(<a href=https://github.com/istio/istio/issues/50506>Issue #50506</a>)</p></li><li><p><strong>Updated</strong> the behavior of XDS generation to be aligned when a user has a <code>Sidecar</code> configured and when they do not. See upgrade notes for more information.</p></li