[Realm .Net] Cascade delate when using backlink relationship

Hello.

I have a backlink relationship through two objects inside my app

public class JobwalkItem : RealmObject
    {
        
        [PrimaryKey]
        [MapTo("_id")]
        public string Id { get; set; } = Guid.NewGuid().ToString();

        [Required]
        [MapTo("_partitionKey")]
        public string PartitionKey { get; set; }
  
        public int Count { get; set; }

        public double UsePeriod { get; set; }

        public string Name { get; set; }

        [Backlink(nameof(JobSummaryItem.JobwalkItem))]
        public IQueryable<JobSummaryItem> JobSummaryItems { get; }

    }
public class JobSummaryItem : RealmObject
    {
        [PrimaryKey]
        [MapTo("_id")]
        public string Id { get; set; } = Guid.NewGuid().ToString();

        [Required]
        [MapTo("_partitionKey")]
        public string PartitionKey { get; set; }

        public JobwalkItem JobwalkItem { get; set; }

        public JobSummaryItem ParentItem { get; set; }

        public bool HasChildren { get; set; }

        
        public int ItemCount { get; set; }

        public double TotalCubes { get; set; }

        public int TotalMoveLaborTime { get; set; }

        
        public double TotalUsePeriod { get; set; }

    }

When I delete a JobwalkItem I assume that it’s JobSummary items also should delete from database. But this does not happen and I need to manually delete all related JobSummary items and then delete JobwalkItem.

So the question is following. Is that an expected behavior and the cascade deletion is applicable only for embedded objects?

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