Same problem here and also sometimes in public frontend, maybe when feedwordpress cron task is triggered?
I’ve solved it temporaly disabling this lines on feedwordpress_advanced_filters.php
function faf_debug($msg)
{
// echo "<p>" ;
// print_r($msg);
// echo "</p>";
// if (function_exists("console"))
// {
// console($msg);
// }
// FeedWordpress::diagnostic('updated_feeds:errors',$msg);
// error_log($msg);
}
Adding “//” at the start of each line as shown.