After a bit of digging around I found a file in wordpress that seems to handle most if not all error reporting. /wp-includes/class-wp-error.php
Do yourself a favor and back that file up before you make any changes to it, (I manually edited the file on my server and when I saved all the php after the code I placed in vanished) and put:
error_reporting(0);
@ini_set(‘display_errors’, 0);
Right after the opening php tags. I have no idea why this doesn’t work in wp-config anymore.
I’m having the same issue. OP have you found a solution?