Worked on stabilizing virtualization in the TanStack/virtual repository, focusing on the initialization process of the lit-virtual component. Addressed a startup race condition by ensuring the Virtualizer instance was created before the hostConnected lifecycle event, which prevented undefined errors during virtual scrolling. This fix improved the reliability of virtual scrolling for large datasets across different environments. The work involved careful debugging and a lifecycle-aware approach to component development, utilizing TypeScript and JavaScript within the context of Web Components. The contribution demonstrated a methodical process for resolving complex initialization issues, resulting in more stable and predictable behavior for end users.