A deployed LWC fix is not showing up / the component is served stale after deploy / an Apex call is slow only on mount / an animation makes the page shift / the bottom of a panel is unreachable / the component "isn't working". The most painful LWC bugs are not in your code, they are in Lightning's caching, action queue, or layout behavior: correct deployed code served from a server-side module cache for minutes, imperative Apex on mount taking tens of seconds until it is deferred past the bootstrap burst, animating layout-affecting properties instead of transform and opacity, and a scroll container structured so the bottom can never be reached. Use when an LWC behaves wro…
