No, this is document as only occurring in development mode.
Yea sadly there weren’t enough characters in the title field for me to put “strict dev mode” so that nuance was lost
Edit: dang updated the post title to include this
Aside from being development-only, note that you also need to wrap a component in `<React.StrictMode>…</React.StrictMode>` to opt it into this.
Yeah, good point - I thought it could be that Next.js changed their default behaviour to use strict mode when they upgraded to React 18 but another comment says React 17 silenced the duplicate logs(!) so maybe the change is older than that.