I use Sketch to create all kinds of graphics and today I’ve noticed that some blending modes are not rendered correctly. For example, the following graphics contain:
a circle
a white-to-black gradient on the border
50% opacity
color dodge blending mode
It looks like this in Illustrator and Affinity Designer:
Your example is close to mine, and I found another weird display issue. If I drag the opacity slider to 99% or less, your circle suddenly starts looking like this: