Worked on the BiteSpeed-Dev/chatwoot repository to address a critical reliability issue affecting Line sticker image rendering. Focused on backend development using Ruby, the work involved correcting the sticker URL variant from 'iphone' to 'android' to resolve image display failures across devices. The solution required careful API integration and was validated through manual testing and log review to ensure consistent asset loading across all variants. Delivered as a single, targeted commit, the fix improved user-visible stability without introducing broader API changes or regressions. The approach demonstrated attention to detail and a methodical validation process to maintain platform reliability.