My case with Apple has progressed a little but not in any meaningful way.
Engineering asked for photos comparing 5 and 5S in same circumstances.
So i provided them with 8 photos of flat, long-edge, short-edge & compass comparing the 2 phones.
They'll then decide whether to capture the device and what they're gonna do...
Very much sounds though like Apple are in the capture & diagnose stage of this rather than having a full understanding and engineering a solution.
This has REALLY taken the shine off my new iPhone....not played my favourite games for days ...
Had i not done a cascade of my previous devices - we are a 3 device family, i have latest, wife has previous and i use 3rd oldest for work and sold the previous oldest - i'd have sent my 5s back and cancelled my upgrade.
Kinda stuck with it now as i'm past my contract cooling off period.