Worked on the Sylius/Sylius repository to address a critical frontend issue affecting the cart experience. Focused on improving reliability by fixing a bug that caused infinite loading after the Add to Cart action, the solution involved re-rendering the relevant component post-redirect to ensure the loading state cleared correctly. Utilized CSS, HTML, and Twig to reinforce frontend reactivity and maintain a seamless checkout flow. Enhanced code documentation and commit messaging to support maintainability and future regression detection. The work prioritized technical reliability and developer confidence, delivering a more stable user experience without introducing new features during the development period.