Browser API error 12000 with offset,Browser API error 12000

Hi, I need help with this response body.

{
    "errors": [
        {
            "errorId": 12000,
            "domain": "API_BROWSE",
            "category": "APPLICATION",
            "message": "There was a problem with an eBay internal system or process. Contact eBay developer support for assistance."
        }
    ]
}

I'm creating a request to https://api.ebay.com/buy/browse/v1/item_summary/search?category_ids=19006&limit=200&offset=4200 and get this error. But this problem is only after specific offset (think 3000 and more).

My x-ebay-c-request-id is "ri=WE6trwn3qA6r,rci=aba702e6928aa3bb"
and rlogid "t6p%60gu%60mgwj%3F%3Cumjubbweobuo*%3Aojc%3B%28rbpv6710-17be65305d3-0x13d"
and time is Tue, 14 Sep 2021 22:00:10 GMT.

I also think that it was something with timeout, because every query reqtest, that has longer then 5 seconds, have this error. Requests that has a timout < 5 is fine.