nd <code>proxyVersion</code> set which can cause the <code>EnvoyFilter</code> not to be applied during an upgrade. Using the <code>INSERT_FIRST</code> or <code>ADD</code> option or setting the priority may help in ensuring the <code>EnvoyFilter</code> is applied correctly." The reason for concern with the <code>proxyVersion</code> is that after an upgrade the <code>proxyVersion</code> would likely have changed and the order it is applied would now be different than before.</p><h2 id=an-example>An example</h