var productsByRecalls = await _context
  .Products
  .Include(x => x.Suppliers)                              // <-----
  .Include(x => x.Recalls)                                // <-----
  .AsSplitQuery()
  .OrderBy(x => x.CreatedAt)
  .Where(x => x.Status == ProductStatus.Approved)
  .GroupBy(x => x.Recalls)                                // <-----
  .Where(x => x.Any()).Select(x => x.SingleOrDefault())
  .ToListAsync();

Without grouping that works as expected, and the Include collections are eager loaded.

But when using grouping, the Suppliers and Recalls collections are empty.

Why does this happen, and how can I include them?