Thanks for the report. This is a bug that was noticed unfortunately just after 4.5.4. was released, but it was fixed in 4.5.5.
Given you updated past that already, you should now be all set. Note that I would edit a currently existing task and click submit (even without making any change), or create a new scheduled task to refresh your crontab. If my memory is correct, all scheduled tasks should be updated/fixed then.