Delayed notifications

Hello,

I woke up today, to a sound of a Pulseway notification on my phone, it was around ~9.30-ish AM.
The notification message says that my server is offline. I check emails, there is also a new email in my inbox from Pulseway at 9.40am on the dot, stating the same thing.

Naturally I go ahead and try to log on to my server, which lets me log into it and is not offline.

So I go into the mobile app notifications, and realize that today Feb 17th, both the app and the email decided to notify me of something that happened on Feb 9th, and was a planned restart.
Any idea why such a thing would happen? And how to resolve such an issue?

Best regards,
Signing off,
cyph0rg.