Hikvision Doorbell Notifications glitch

Hi,

I have the Hikvision DB-120A-IW 1080p doorbell camera setup correctly to my Hikvision DVR and the Hikvision Hik-Connect App on my iphone.

For a long time everything worked fine, including the motion detection and getting a screenshot notification on the app every time somebody came to the front door.

But all of a sudden, the notifications have stopped working. Although everything else still seemed fine, such as getting a 24/7 live connection to my DVR and being able to get a live feed...

Hikvision Doorbell Notifications glitch