What causes my Samsung phone to lag when I connect the charger?

I'm using a Samsung A03 and the factory usb-C to usb-C cable provided by Samsung. I've actually noticed this in other Samsung models I've owned in the past. If I'm playing a game when I connect the charger, it almost makes the phone completely unresponsive where it takes up to 15-20 seconds for any input to register. This usually leads to me hitting the home or active apps button multiple times thinking that maybe I missed the button the first time. The frustrating thing is that every input is queued leading to "System UI not responding" message and myself throwing a tantrum like a 3 year old