Color corruption on resize when HW transcoding HEVC content - Synology DS920+

I grabbed the file myself as well.

This is what I get in converting to 4 Mbps @ 1080p

Taking it down to 4 Mbps @ 720

Here’s your file, loaded and playing at 720p 2 Mbps

Look at her eyes. They’ve been overly processed. The curvature is gone at the iris.
(unless that’s how she looks??)

In watching the whole clip, I get no color breakup or lines or anything.

What resolution should I be using? 720p / 2 Mbps ?