Entity framework not detecting jsonb properties changes in c#

I am using Entity Framework Core with npgsql postgresql for Entity Framework Core. and i'm working with .net core 3

My question is, when i try to update a MyTableRelated element from the MyTableClass and saving the context to the database, no changes are detected.

For example, lets suppose we have the following classes:

public class MyTableClass
{
    public int Id { get; set; }

    [Column(TypeName = "jsonb")]
    public virtual List<MyTableRelated> Data { get; set; }
}

public class MyTableRelated
{
    public int Id { get; set; }

    public string prop1 { get; set; }

    public string prop2 { get; set; }
}

and some code like this (this is not actual code, its just to get the ideia):

var context = dbContext;

var newMyTableClass = new MyTableClass() {
    Id = 1;
};

var newMyTableRelated = new MyTableRelated(){
    Id=1;

    prop1 = "";

    prop2 = "";
}

newMyTableClass.Data.Add(newMyTableRelated);

context.SaveChanges();

This works, and the entry is saved on the database.

Now somewhere on the application, i want to access that entry and change values on Data:

var context = dbContext;

var updateMyTableClass = context.MyTableClass.FirstOrDefault(x => x.Id == 1);

var tableRelated = updateMyTableClass.Data.FirstOrDefault(y => y.Id == 1);

tableRelated.prop1 = "prop1";

tableRelated.prop2 = "prop2";

context.SaveChanges();

I would suppose this would change values on database, like it does for other types of properties. But nothing happens.

A solution i found, was using this:

var entry = context.Entry(updateMyTableClass);
if (entry.State == EntityState.Unchanged)
{
   entry.State = EntityState.Modified;
}

This is more of a temporary solution for that case.

How can we then make the EF automatically detect changes on jsonb properties?

Someone pointed to me that i should look at coase grained lock. https://www.martinfowler.com/eaaCatalog/coarseGrainedLock.html

How can something like that be implemented?