Some renders have 1px cropped on all sides

Hopefully this is some feature I don't understand, and not a bug. After I rendered my project out of Resolve (9.0.3), some of the shots (about 10%) are slightly cropped. It looks like 1px on the top and left, and half a pixel on the right and bottom sides. All the settings I can see for input sizing, output sizing, and blanking are at defaults. I attached two frame grabs so you can see what I'm talking about. One is from the render from Resolve, and the other is from the confidence check. All the source footage is Prores 422 HQ, and I'm rendering to the same. All 1080p.

Conf_Check_092322.jpg (111.94 KiB) Viewed 1760 times

V1-0129_MVI_1979-4.jpg (115.25 KiB) Viewed 1760 times

Help please! I can't move on until I solve this one.

[Rohit Gupta]

In Project Settings, there should be an option for Anti-Alias. Switch it off.

Yes! That was it, thank you!. Which got me thinking... and it turns out all of the clips that got cropped were originally 720p in my 1080p timeline. Makes sense.
What is the benefit of anti-aliasing in Resolve? I know it's generally intended to reduce jagged edges, but comparing my shots, with/without anti-aliasing, they are pixel-for-pixel identical except for the edges.

V1-0129_MVI_1979-4-noalias.jpg (111.94 KiB) Viewed 1739 times

His nose is a bit Red!... forget the pixel!!... just pulling your leg and learning something new every day.
No offence,
Radman.