Hello, our requirements on cron jobs in free hosting is that you may have no more than one cron execute in a 5 minute period.
Every hour, you have 2 crons executing, and every day, you have 3, so our system is automatically stopping and deleting your cron jobs. You will need to modify the run times so that none of these cron jobs overlap, or write a wrapper script cron that executes every 5 minutes that calls your other cron jobs as necessary.