KseandI developed a security-focused feature for the JetBrains/Avalonia repository, enhancing password field input handling in C#. The work centered on preventing key modifiers from affecting word-based editing within password fields, thereby reducing the risk of information leakage through unintended text manipulation. KseandI implemented comprehensive unit tests to cover critical security edge cases, ensuring that privacy was maintained without impacting the behavior of non-password text fields. The approach emphasized stability and compatibility, with clear commit-based traceability throughout the process. This contribution demonstrated depth in security, UI development, and testing, addressing a nuanced privacy concern in user input handling.