I was also going crazy with my Scosche Magic mount & the metal plates. I have the new Note 8 & bought a wireless charger. No matter wich plate is used or location of plate it disrupted the magnetic field of charger. I have the Otter box defender case that comes with a plastic belt clip holster. I was about to buy a different type of mount, when an idea popped into my head. I attached the metal plate to the holster & it he'll just fine on the mount. You'll still be about to use even when the belt clip breaks off (which happens frequently.
I too have the Note 8 and the Scosche Mount.
I was actually hesitant to use the mount and let me tell you why.
I got my Note 8 on Sept 5 (10 days early) on preorder. The device worked fine as I was out of town for most of that time. When I returned, of course I was back using my car mount.
I typically mount and charge in my car at the same time. But suddenly, my device stopped charging. It would tell me the battery was too hot (even when the device was dead cold) and wouldn't accept any charge at all.
I was thinking maybe it was the mount interfering with the coils/battery but I'm not sure...
I actually tried wireless charging once the charging stopped (without the mount at this point), and that worked for a bit... Then that stopped too.
I've got a brand new Note8, now, and so far no issues. I must say this thread has given me a little more peace of mind on the matter, but we will see if the issue repeats itself, or if my initial unit just had some internal thermometer defect.