Ticket #58676: 58676.2.patch

wp-content/themes/twentytwentytwo/style.css

@@ -159 +159 @@
 .wp-block-post-comments ol.commentlist li.comment:not(:last-child) {
         margin-bottom: 1rem;
 }
+
+.wp-block-post-comments .comment-form-comment textarea{
+        box-sizing: border-box;
+        width: 100%;
+        display: block
+}