Mk_mysql plugin simply ignores my mysql.cfg

Troubleshooting
12

inotifywait -m /etc/check_mk/mysql.cfg produces the following result:
/etc/check_mk/mysql.cfg OPEN
/etc/check_mk/mysql.cfg ACCESS
/etc/check_mk/mysql.cfg CLOSE_NOWRITE,CLOSE
/etc/check_mk/mysql.cfg OPEN
/etc/check_mk/mysql.cfg ACCESS
/etc/check_mk/mysql.cfg CLOSE_NOWRITE,CLOSE
/etc/check_mk/mysql.cfg OPEN
/etc/check_mk/mysql.cfg ACCESS
/etc/check_mk/mysql.cfg CLOSE_NOWRITE,CLOSE…