Worked on the atomiks/base-ui repository to address a persistent scroll lock issue in the Combobox component, focusing on improving user experience and accessibility in React-based front end development. Applied a targeted JavaScript and TypeScript fix that resolved body scroll lock when a controlled value triggered a re-render, ensuring more predictable dropdown behavior. Refactored the AriaCombobox open state logic to stabilize controlled and uncontrolled usage, enhancing reliability and accessibility compliance. Added a regression test to prevent future occurrences of the bug, which strengthened overall test coverage. These changes reduced scroll-related support issues and improved consistency for form and dropdown interactions.