Problem with photos.search method?

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I have been using the VKontakte API for a year. My application displays photos of VK users on a map around the world. The photos.search method is mainly used . In recent days, the amount of data returned by this method has fallen by about 50% compared to previous months. In some places, the number of photos dropped from a few hundred a day to a few dozen. Has anyone encountered a similar problem? Maybe there have been some changes in the API? Nothing has changed in the official documentation.
Thanks