Several galleries & group of galleries

If you create 2 or more galleries in ACF, then in the API each subsequent gallery object contains the objects of the previous ones. This is strange, considering that the image IDs are different for every image.

If you create a group and put a gallery in it, then when adding an image for a post from the media library, when saving the post, the image disappears and is not saved. In the API, accordingly, there is an empty object.