Okay, I've made a new scene, default stuff except for choosing a cubemap and placing a character.
To start with the posing problem first. I gave her a pose, then rotated her neck by having it "Follow" the camera and then enabling "Fixed" on the neck. Then, I first took a normal rendered screenshot (F12). Note her correct neck rotation:
View attachment 2221670
And here is Ansel making a render with default settings:
View attachment 2221671
So the problem that the neck returns to its initial "normal" position/rotation is clear here. As I mentioned, the "Keyboard Shortcut" window seems to cause this.
Now to show the second problem. Here is the result of what happens when I select the Super Resolution option in Ansel and try to render the image in 7680x4320 (it saves the file as an .exr, I just converted it to .jpg and downsized it to post it here):
View attachment 2221675
Lul wut? So this should look like the first pic I posted above, only in 8k, but instead it looks like this.
I doubt the problem is scene-specific (since I've always had these same two issues), but here's the scene:
View attachment 2221679