I was having a problem with the wireless charging not working all of the time. Sometimes I would have to adjust the case, press hard on the back of it, or remove it and replace it in order to get it to work. I even widened the holes on the back of the phone - still didn't work right. I realized that the problem was that the nubs on the cover were too short. I added tiny bits of wire to the holes in the phone and placed the cover over them. Now it works every time. I cannot tell they are there - the cover does not bulge at all.
Small bits of wire:
Next to the holes:
In the holes:
Small bits of wire:
Next to the holes:
In the holes: