Ticket #59285: 59285.1.2.patch

wp-content/themes/twentynineteen/style-editor.css

@@ -1605 +1605 @@
   padding-right: 0;
   width: 100%;
 }
+
+/* Post Author Block  */
+.wp-block-post-author__avatar img {
+    border-radius: 100%;
+}
+ No newline at end of file