Reminder Ghosting (Windows 10)

Reminder Ghosting (Windows 10)

Reminder Ghosting (Windows 10)
I don't always sit in front of the Montior, when a reminder message from Nimubs appears, it disappears again as if it had never been there.
Would it be possible if I come back to my monitor and see there is a missed reminder message? (Windows 10)
I have attached a video with the problem.
Thanks.