Pages crawled by recacher are not cached

I am trying to us recacher / httprl to load expired/purged pages into the nginx micro cache.
So far all expired pages are crawled by git requests as can be seen in nginx and apache logs.
As soon as I hit a recached page in the browser, it is completely reloaded from apache and not from the cache.

I too use wget to pre fill the cache by spidering the site. Those wget requests are cached in the micro cache and a browser gets a page from the cache.

Up to now I couldn't identify a big difference between the httprl and wget requests - they are both get requests, no-proxy used… .

Any ideas or explanations?