reproduction steps

See GradientOvalStrokeMaskBlurSigmaZero introduced in flutter/engine#55717

seen results

expected results

I'd expect smooth sides, notice the dimples at either ends of the shape.

version

https://github.com/flutter/engine/tree/772142e52853fcc3779f22bf5f3203010ee253ee