Yes... the EP-WG900IB with the black square charge pad
Apparently every one should have the same problem with the samsung cover, the phone only charges upto 96% or to 100% then an error LED flashes(orange LED), from all my test using the following transmitter:
3 samsung (single coil)
iffy (single coil)
sanwa (7 coils standing)
yijieneng (dual base, single coil)
panasonic (motion movable single coil)
metrans (3 different models, single coil, two models are potable power bank)
powerqi (3 coils)
sanyo/do co mo (2 models, single coil and motion movable single coil)
anymode (3 coils)
Receivers
samsung OEM wireless cover (S5 Version)
yijieneng (S4)
sandisk (S4 and note 2)
energy/itian ( S5)
yijieneng USB QI wireless dongle (Universal)
metrans (S4)
A type USB qi wireless (Universal)
and some other unknown type (Universal)
Iphone qi wireless case
It has come to my conclusion that the samsung transmitter has compatiblity problems with it's own wireless cover, the samsung cover works well with all my other chargers with a slight problem with the panasonic, but my panasonic has been know to have issues with some receivers, and the sanwa (standing transmitter) the phone has to be placed upside down or horizontally, Although my sanwa has 7 coils, may be the location of the coils is in lower part of the charger.
while the rest of the receivers works well with the samsung transmitter, and they all work pretty well and produce less heat, when chargered upto 100%, the green LED stays on.
May be someone should bring this matter up with samsung, but it could be useless as they won't really listen.