Worked on enhancing data visualization reliability in the JakobKirschner/pandapower repository, focusing on a critical bug fix for the pf_res_plotly plotting tool. Addressed an issue where colorbars were not displaying correctly for line plots by refining how marker coordinates were retrieved and ensuring accurate association between the colorbar and line data. Utilized Python and Plotly to implement the solution, which involved debugging invisible marker handling and improving scatter trace linkage. This targeted fix resulted in more stable and interpretable visualizations, reducing user confusion and support requests while contributing to the maintainability and clarity of the codebase.