Different line width

I use line chart graph. Line width at 100% is thinner than others. Please help me. Thank you.

The issue names no source file, test, or entry point. Start by reproducing the line chart shown in the screenshots and locating the rendering path that handles line width; done means the 100% width matches the expected visual thickness and the behavior is covered by a regression check.

Written by the indexing model from the issue text.