Worked on AvaloniaUI/AvaloniaEdit, focusing on enhancing the stability and fidelity of text rendering within the editor component. Addressed a persistent issue where special and control characters caused misaligned or jumping text, refactoring the text formatting and rendering logic to ensure consistent display across platforms. Improved the handling of collapsed foldings, resulting in more predictable UI behavior and reduced visual artifacts. Utilized C# and applied expertise in editor component development, text rendering, and UI development to deliver a targeted bug fix. The work contributed to a smoother user experience and improved cross-platform reliability without introducing new features during the period.