Actually, just noticed that it is in the release notes As of API version 2022-07, the HasMetafields.metafields paginated connection in the Storefront API is deprecated. Previously, this connection enabled you to paginate over all visible metafields i...

I've just ran into the same issue. Reverted to the 2022-04 storefront api for now but can't find any info on this. Have you found anything ?