Error msg on first run

[lampsbr]

Hi, I've faced this error message using this starter and one other template project today. So it means could be some recent development in next.js or related package, or something in my local environment. Anyway I'm a bit puzzled about what is happening. I run bun i then bun dev, page shows up perfectly at localhost:3000 but console logs this error message:

Warning: Prop `className` did not match. Server: "__className_36bd41 vsc-initialized" Client: "__className_36bd41"
    at body
    at html
    at RootLayout (Server)
    at InnerLayoutRouter (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/layout-router.js:243:11)
    at RedirectErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/redirect-boundary.js:74:9)
    at RedirectBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/redirect-boundary.js:82:11)
    at NotFoundErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/not-found-boundary.js:76:9)
    at NotFoundBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/not-found-boundary.js:84:11)
    at LoadingBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/layout-router.js:349:11)
    at ErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/error-boundary.js:160:11)
    at InnerScrollAndFocusHandler (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/layout-router.js:153:9)
    at ScrollAndFocusHandler (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/layout-router.js:228:11)
    at RenderFromTemplateContext (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/render-from-template-context.js:16:44)
    at OuterLayoutRouter (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/layout-router.js:370:11)
    at RedirectErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/redirect-boundary.js:74:9)
    at RedirectBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/redirect-boundary.js:82:11)
    at NotFoundErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/not-found-boundary.js:76:9)
    at NotFoundBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/not-found-boundary.js:84:11)
    at DevRootNotFoundBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/dev-root-not-found-boundary.js:33:11)
    at ReactDevOverlay (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/react-dev-overlay/app/ReactDevOverlay.js:87:9)
    at HotReload (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/react-dev-overlay/app/hot-reloader-client.js:321:11)
    at Router (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/app-router.js:207:11)
    at ErrorBoundaryHandler (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/error-boundary.js:113:9)
    at ErrorBoundary (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/error-boundary.js:160:11)
    at AppRouter (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/components/app-router.js:585:13)
    at ServerRoot (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/app-index.js:112:27)
    at Root (webpack-internal:///(app-pages-browser)/./node_modules/next/dist/client/app-index.js:117:11)
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Is it also happening to somebody else?