my WordPress back-up system (“BackWPup”) gets triggered 2 or 3 times for a single daily back-up job

• https://wordpress.org/plugins/backwpup/
• https://backwpup.com/docs/starting-backup-job-immediately-or-scheduled/

So far I have been using the “WordPress cron” approach.

I have no idea, why the problem described above happens. But it confuses me a lot.

Maybe I am going to try the WP-CLI approach next.