Samsung A23 Charging Issues Started After Sometime, Unstable

charging issue with my Samsung A23 phone is just so bothersome...no problems initially; using the original fast charger provided by Samsung. Suddenly, fast charging stopped. Checked the socket, cleaned it, but the issue persists. Charging shows 10 hours, drops to 2, then rises again. Tested the same cable and adapter on another phone, and it fast charges. My phone used to fast charge, but now it's upsetting. I'll seek a resolution for this issue. I want the problem fixed, and my frustration to end, whatever the cause may be.