I have a Galaxy S6 Edge Plus, my wife has a Galaxy S6, I bought an original OEM Samsung wireless charger pad (the circular one), when trying yo charge the phone on the wireless charger it would charge for a few seconds and then it would stop charging and then back to charging after a couple of seconds, twas with both phones, so I assumed it was the charger, I bought an after market charger that looks like the original Samsung but not OEM, and I experienced the same issue.
So I started searcthe internet looking for a solution and I found a few solutions that did not work for me, such as turning daydream on, recalibrating the battery, and one more that I can't tof right now, neither of these solutions worked for me.
I found another solution that did work for me wis, not to use the wireless charger with the USB cord and charger that the wall charger came with, but use it with the USB cord and wall charger that THE PHONE CAME WITH , and NOT connected to the computer but into a wall outlet.
After I tried tbot of my chargers, the OEM and the aftermarket worked just fine.
I hope tworks and helps someone because I know that it was driving me loco.
Please let me and everyone else if tworked for you.