Call parent apply_filters, rather than parent of parent apply_filters. Then apply site filter.
However, note that it may be wiser, especially if the number of disparate data objects increases between sites, to perform the site filter before applying other filters.
Call parent apply_filters, rather than parent of parent apply_filters. Then apply site filter.
However, note that it may be wiser, especially if the number of disparate data objects increases between sites, to perform the site filter before applying other filters.