I tried this solution with the current intel drivers, as well as the version before that. Neither of these worked, and the problem remained.
I have a US device and am unable to roll back my drivers. Please let us know as soon as Microsoft has a solution to this. I will be purchasing another product until then.
I don't know when this will be fixed (or even if). I'm a volunteer and not a paid employee. Miracast is a mess right now. The SP3 isn't even a certified Miracast device. Microsoft moves very slowly, so even if they do decide to get this fixed (and it's a driver they have to get from Intel) it could be months.