Email notifications act weird


I can see that the e-mail notifications are acting weird.

I’ve set both the personal and admin settings to receive an email notification every time someone downloads a file from a public link.
I’ve set the sending frequency to Hourly.

The email notifications do get sent eventually, but not in the right time.

For example, I downloaded a file to test the functionality about 12 hours ago, and I got the email for that download some minutes ago (12 hours later).

This has happened again (getting the email notification hours after the download has happened).

Is there something I haven’t understood correctly about the sending frequency or is this a bug?