nextjs - 💡(How to fix) Fix Regression: hydration mismatch with <Suspense> + dynamic imports after upgrade to Next 15 (very common issue) [1 comments, 2 participants]

TL;DR

Downgrade to Next.js 14 or wait for a fixed version of Next.js 15 to resolve hydration mismatch errors with dynamic imports inside <Suspense>.

Guidance

• Verify the issue by checking the console for hydration mismatch errors and observing broken UI rendering in production or SSR mode.
• Test the application with a static import instead of a dynamic import to see if the issue persists.
• Consider opening a pull request or commenting on the existing issue (#84423) to bring attention to the problem and potentially expedite a fix.
• Review the React and Next.js documentation to ensure that the <Suspense> and dynamic import setup is correct and compatible with Next.js 15 and React 19.

Example

No code snippet is provided as the issue is related to a specific version of Next.js and React, and the fix is likely to involve updating or downgrading these libraries.

Notes

The issue seems to be specific to Next.js 15 and React 19, and downgrading to Next.js 14 may be a temporary workaround. However, this may not be feasible for all projects, and waiting for a fixed version of Next.js 15 may be the best option.

Recommendation

Apply workaround: Downgrade to Next.js 14 until a fixed version of Next.js 15 is available, as this is the most straightforward way to resolve the hydration mismatch errors with dynamic imports inside <Suspense>.