Motorola Solutions — battery reverse charging

Its been 5 months since i bought this phone (Moto g5s plus)..
Been a great journey, i must admit that.. But since last three days when i put my phone on charging the battery percentage starts decreasing.. Like if i put on charge at 18% then within 2-3 minutes it gets to 10-12%.. What happened to turbo charging.. Please give me some solution.. I am really pissed off!!!