多对多查询时，中间关系表没数据时未能将主表数据查出bug

[shuxinqin]

    public class Product
    {
        public long ID { get; set; }
        public string ProductName { get; set; }
        [Navigation]
        public virtual List<ProductTag>? RelationList { get; set; } = new();
    }
    public class ProductTag
    {
        public long ID { get; set; }
        public long ProductID { get; set; }
        [Navigation("ProductID")]
        public Product Product { get; set; }
        public long TagID { get; set; }
        [Navigation("TagID")]
        public Tag Tag { get; set; }
    }
    public class Tag
    {
        public long ID { get; set; }

        public string TagName { get; set; }
        [Navigation]
        public virtual List<ProductTag>? RelationList { get; set; } = new();
    }

var list = dbContext.Query().IncludeMany(a => a.RelationList).ThenInclude(a => a.Tag).ToList(); 如上查询，如果中间表 ProductTag 没有对应的数据，则主表数据也不能查出。