I have a problem with requesting more than 10000 items.

With Stack Overflow it works just fine. But with Super User, Server Fault, etc. no items are returned for requests for items after the 10000th and has_more is false.

It doesn't matter whether page and pagesize are both 100 or page is 200 and pagesize 50.

Example:

https://api.stackexchange.com/2.2/search/excerpts?page=199&pagesize=50&order=desc&sort=activity&q=security&site=serverfault

Works and has_more is true.

https://api.stackexchange.com/2.2/search/excerpts?page=200&pagesize=50&order=desc&sort=activity&q=security&site=serverfault

Doesn't work anymore and has_more is false.

Is this a bug or am I missing something?