FOUND THE CULPRIT ACTION: shutdown

--- BACKTRACE ---
#0 /home3/ysyvtbrk/public_html/wp-includes/class-wp-hook.php(400): {closure}()
#1 /home3/ysyvtbrk/public_html/wp-includes/plugin.php(975): WP_Hook->do_all_hook()
#2 /home3/ysyvtbrk/public_html/wp-includes/plugin.php(501): _wp_call_all_hook()
#3 /home3/ysyvtbrk/public_html/wp-includes/load.php(1308): do_action()
#4 [internal function]: shutdown_action_hook()