Dear Samsung Member,
Greetings from Samsung Customer Support!
Kindly follow the below mentioned path to improve the performance of the device:
App Icon badges shows you the numbers of unread alerts.
Settings> notifications> App icon badges> enable> click on number
If the issue still persists, kindly attach the log file and send it to us in the Samsung member application (attach when the issue occurs within first 15 minutes of the occurrence of the issue.):-
Samsung Members App > Feedback >Error report > Attach log file for any issue
Thank you for writing to Samsung.
Samsung Customer Support