I have the same issue with black crush, was not even aware of the HDR! May be worth adding "black crush" to the title of this post so others may find it?I will be returning my replacement S9+ phone for a full refund. Disappointed
If anything, this update has made the black crush worse on infinity wallpapers. Especially the grey one. Set that go to home screen and swipe up.. now look at your bottom right corner
This is NOT fixed with ARCC update. All Samsung did was alter the wallpaper to make it look a little better at low brightness. The overall issue with black crush/adark colors becoming black and mashing into one is still present in the latest software. As yet, there is no fix for this.