The r3 on the top edge at x = 60 takes tangent_chain: false, so it rounds that edge alone and not the r5 round's tangent chain with it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01BnQawySUFx57iaJZq7z1Fm (cherry picked from commit cf46e2a713c45ae0427e831cae1dc1d3b858febc)