Sometimes you get stuck background processing, possibly a cause of this if you are not using the app for something.
One thing you can try is Wiping the Partition Cashe on the phone
Wiping the Partition Cashe clears out a lot of old or corrupted information that can cause issues
Follow the steps below. You must follow every step and you should be done in about a minute
Turn off your phone.
Connect your phone with a USB cable
to PC or another Samsung mobile
You will see the charging icon on your screen.
Wait till it shows charging with battery percentage.
Next, press and hold the Volume up and Side key simultaneously.
You can press the volume up button just before the Side key.
The Samsung Logo followed by
Samsung Galaxy appears on the
screen.
At this point, release the keys
Phone will boot into Android Recovery mode
In Android recovery mode, using Volume keys, choose "Wipe Cache
Partition" .
Use the power button to accept that.
You will then see its cleared.
Then the top option, reboot phone.
Press the power button to reboot the phone and then sign in normally
You can repair apps from the recovery menu
Do also regularly restart your phone. Helps to keep the software optamised
