We are glad to help you. For superb Gaming experience, please find below steps.
1) Not installing the latest updates.
2) Intermittent Network Signal.
3) Proximity of Samsung device from Router.
4) Many Apps running in the background.
5) Not resetting the phone after long heavy gaming.
1) Install the up-to-date Software updates.
2) Check wi-fi connectivity, call network provider for the status coverage signal.
3) Check Router, update settings, and adjust proximity to your Samsung phone.
4) End Running applications in the background.
5) Run Diagnostics from Samsung Members app.
6) Re-start your device.
Hope your problem gets solved.