S7 edge Fast charging issue

[Android Central Question]

I have a s7 edge that fast chaging is not working. I got to battery setting where you can turn fast charge on and off and it is turned on, i plug in charger and fast charge turns off i unplug charger and fast charge turns back on. I am using charger and usb cable that came with phone. Does anyone have any idea how to correct problem if it can be corrected?