ong> a <a href=https://github.com/istio/istio/issues/16458>bug</a>, which blocked external HTTPS/TCP traffic in some cases.</li></ul><h2 id=security>Security</h2><ul><li><strong><em>Added</em></strong> <a href=https://github.com/istio/istio/pull/22789>JSON Web Token (JWT) caching</a> to the Istio-agent, which provides better Istio Agent SDS performance.</li><li><strong><em>Fixed</em></strong> the Istio Agent certificate provisioning <a href=https://github.com/istio/istio/pull/22617>grace period calculation<