Worked on the lvgl/lvgl repository to enhance rendering correctness and UI stability in embedded systems. Focused on a critical bug fix involving the lv_refr_get_top_obj function, introducing a visibility gating mechanism that checks an object's main style opacity before considering it for top-object rendering. This approach prevents rendering artifacts by ensuring only fully visible objects are processed, improving the reliability of dynamic GUI scenes. The solution was implemented in C, leveraging expertise in embedded systems and GUI development. Changes were validated through code review and targeted testing, resulting in a more robust rendering pipeline without introducing unnecessary complexity or surface area.