ISR - Build Cache Issue: Pages Re-fetching on First Access

[dawid-jazdzewski-BO]

Hi,

I’m experiencing an issue with Incremental Static Regeneration (ISR) with Next 14 and build caching in Next.js. Despite setting up generateStaticParams and configuring the revalidate time to 86400 seconds (24 hours), the page seems to rebuild during the build process, as evidenced by logs from my CMS fetching the appropriate content. However, upon first access to the page, it re-fetches the content as if it wasn’t already built.

I’ve set NEXT_PRIVATE_DEBUG_CACHE=1 and observed the following in the build logs:

get ef0c0cc62bdb8adb32d5cc5f67719e540857855ef0b4d656be86c5443572222e [ 'homepage-single-type' ] fetch false
get 90f0ee667e00c757927766e10eaa0bbdc87fdefe9be1fcd2540e5f80072c4533 [] fetch false
get cc4b9a9fb9493d451662108683b8da210ba48d1238165c298bd96fbf647b3e8a [ 'homepage-single-type' ] fetch false

And upon the first access to the page, I see:

get ef0c0cc62bdb8adb32d5cc5f67719e540857855ef0b4d656be86c5443572222e [ 'homepage-single-type' ] fetch false
get 90f0ee667e00c757927766e10eaa0bbdc87fdefe9be1fcd2540e5f80072c4533 [] fetch false
get cc4b9a9fb9493d451662108683b8da210ba48d1238165c298bd96fbf647b3e8a [ 'homepage-single-type' ] fetch false
set cc4b9a9fb9493d451662108683b8da210ba48d1238165c298bd96fbf647b3e8a
set 90f0ee667e00c757927766e10eaa0bbdc87fdefe9be1fcd2540e5f80072c4533
set ef0c0cc62bdb8adb32d5cc5f67719e540857855ef0b4d656be86c5443572222e

It appears that the cache set operation isn’t being triggered correctly during the build, leading to content being fetched again on first access. Could anyone provide insights into why this might be happening or suggest potential solutions?

Thanks!