How to run more than 50 cron tasks in ISP?

Question

Task Schedulers

In isp panel, created more than 50 cron wget jobs with links to 50 urls, all sites are on the same server.

The tasks are the same everywhere, the execution time is the same, every hour and at 18 o'clock - a different crown.
The problem is that cron works as it wants, then it will work, then it will not work, then it will work for some sites.
What could be the problem?
Cron can hang due to the fact that 50 tasks need to be completed in 1 minute?
To be honest, I've been messing around for about 2 weeks, I still don't understand anything. Errors are not displayed.
Cron is executed by clicking on the "Run in isp" button and this works but not all.
The task looks like this:

1 * * * *	wget -O /dev/null "https://site.ru/admin/crontab?cronToken=usgfjh5df7g6"

It happens that at 1 o'clock, on certain sites, the cron did not work, I go into the settings, change the execution time to once per minute and the cron works, what prevented it from working on schedule?
Horrible, creepy.
Help me to understand.
Thank you!

Answer 1

If the cron does not have time to run the task at this minute, it ignores it.
Divide by different minutes.