Render at source resolution creates cropped frames!

The other day I tried to deliver a timeline that had the box checked> Render at source resolution.
Resolve hated me and rendered footage at that resolution 4096×2160 but zoomed in?????

Render at source resolution

You would think that checking the source resolution box means original resolution, ignoring the sizing from clips, but no, Resolve will hate you and create a weird blown up version at that source resolution of your clip. (if you resized clips)
To render this right you have to also check> Disable edit and input sizing.

Always check both boxes to get source resolution.