No notifications

It tells me on my lock screen that I have a snap from a friend but when I go to the app theres no number of snaps in red on the app. I have to click the app go in, then go out to get the notification to be on the my Snapchat. Fix this cuz sometimes I open my phone to do stuff and I forget that someone snapped me but the red notification number reminds me I have one fix this!

Disappointed707 about Snapchat, v10.14.0.0