Easy Mute is a Samsung feature that allows you to mute incoming calls and alarms quickly just by placing your hand on the screen. The Problem you is facing Seems it only works after the phone starts ringing. I assume the best way to mute the phone is to use the pull-down menu and turn the speaker off.
To resolve the issue please follow the below mentioned steps:
>Reset the device settings by navigating to Settings >> General Management >> Reset >> Reset Settings.
>Run the device in the safe mode and check the issue.
>Check for the latest patch update (Settings > Software Update > Download updates manually).
For further assistance, register your concern in Samsung members app(Open Samsung members app>click on “+“icon>send feedback>Error report/ Ask Questions).
