Worked on the MuseScore repository to address a targeted user interface stability issue, focusing on radio button toggling and visual inconsistencies within group boxes. Applied C++ and the Qt Framework to refine background color alignment and element positioning, ensuring more predictable UI states and reducing accidental toggles. The solution involved debugging UI logic, implementing changes directly in the codebase, and conducting regression testing to verify stability across different themes and layouts. By linking the fix to documented issues and using Git for version control, the work improved user experience and supported smoother workflows for MuseScore’s interface without introducing new regressions.