Region Intersection Bug - Symplifies Curve

I found region intersection unreliable. My goal is to intersect polygonal curve (result of plane region component) with circle. When I experienced unexpected results, I found that the component just symplifies very short parts of my polyline. So I instead took different approach, using trim with region, which is by the way somewhat 10 times faster. Is that a bug?

RegionIntersectionBug.gh (72.2 KB)