Dear Samsung Member,
Greetings from Samsung Customer Support!
To resolve this issue kindly follow the given below steps:
1. Check device cache:-Settings> Device care>Storage>Clean now.
For a particular application: Settings>Apps>Pick the app that you like to clear off the cache memory. For example 'Samsung Internet' >Storage>Clear Cache.
2. Reset the device and before resetting the device make sure to create data backup of your device via SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite.
If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report/ask question).
Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
Thank you for writing to Samsung.
Samsung Customer Support