For me, Xs Smart HDR is amazing! Love it. Works great. And i can tell when Smart HDR is active in a scene by seeing the shutter button spin for a split second. This was on 12.0.1. Ever since i installed 12.1 (beta 3 & 4), smart HDR is not the same. It is as if my phone is doing REAL-TIME HDR on the screen. So, i do NOT see the shutter button spinning like before to denote Smart HDR processing at all...as i did with 12.0.1. Basically, i think that it is doing smart HDR instantly on the iphone screen...so, when i click shutter button, there is no lag or processing at all. Weird. I almost feel like that there is no smart HDR at all....but it is turned ON in setting...and what i see on display is controlled highlights etc.. Is it doing real-time smart HDR on the display itself so that when i click shutter button, it does not need to do any additional processing (thus no spinning shutter button)?? Odd feeling compared to 12.0.1. It is clear that Apple is still fudging around with the smart HDR setting. At least from me testing it, the highlights are not as well controlled with Smart HDR as it was on 12.0.1...the highlights (bright spots) are not as toned down as before on 12.0.1. Anyone else notice this? Sorry, no comparison picture to show what i mean.