During June 2026, this developer focused on improving reliability and developer experience for the NangoHQ/nango repository by addressing a critical frontend issue in ConnectUI. They implemented a targeted fix using TypeScript and advanced DOM manipulation to ensure that repeated calls to ConnectUI.open() would not create orphaned or duplicate iframes, maintaining a single iframe instance throughout authentication flows. The solution preserved the existing public API and introduced robust cleanup logic, reducing UI blocking and DOM leakage in OAuth and basic integrations. Comprehensive tests and manual verification steps were added, resulting in smoother user flows and a lower support burden for integrations.