are you sure ? please do reboot when charging plugged and see it's no charging indicator just LED on.
Sent from my Xiaomi Redmi 3 using XDA Labs
Bedroom charger: LED comes on, screen doesn't wake up, battery meter in the status bar doesn't have a charging icon
Charger by my PC: LED comes on, screen wakes up when I plug it in, battery indicator shows charging icon
I think the charger at my PC is a 'fast' charger while my bedroom uses a normal one.