prefetch: auto
No prefetch export, so this follows the app-wide partialPrefetching setting. Do not write prefetch = 'auto'; omitting the export means the same thing.
What to check
Reach this page by clicking from /prefetch in a build with the network tab open, and compare against the other two destinations. The content below is deliberately the same in all three.
Destination content
probe-shell — App Shell eligible
use cache- cacheLife
- probe-shell
- upstream
- 208ms
ran at exec 2wn8y3age …
probe 227,303
Identical in all three prefetch destinations, so any difference you observe is the segment config and nothing else.