Next.js 15: Unclear CDN Caching Behavior

[mlukasik-dev]

After upgrading my website to Next 15, pages that previously returned a Cache-Control header with s-maxage=... now return private, no-cache, no-store, max-age=0, must-revalidate.

I’m unsure why this happens.

The site uses the App Router, with some pages utilizing searchParams in generateMetadata callbacks, and all fetch requests have cache set to force-cache.
I tried using export const dynamic = 'force-static' - didn't help.

Any insights into this change would be helpful.

[mlukasik-dev]

Any advice on debugging would be very helpful as well :)