When reach full charge the touch screen of my phone not working sometimes normal but oftentimes not working maybe need to replace battery
either the battery or the connector, better bring your unit to nearest samsung service center
Is your device's touch screen only not working after unplugging the charger or even while charging the device?
Both sometimes sir
Have you checked if your unit is still acting the same when charging with another charger you have in your home?
If the problem still persists, then there might be an issue with your battery. You need to go to an Authorized Samsung Service Center for consultation. You can find the nearest Service Center through this link: https://www.samsung.com/ph/support/service-center/