IsFixedLength() isn't propagated to foreign keys

[Neme12]

A foreign key referencing a string column that has IsFixedLength set to true doesn't automatically receive IsFixedLength, resulting in a database error because the column types don't match.

Steps to reproduce

using Microsoft.EntityFrameworkCore;

namespace ConsoleApp3
{
    public sealed class Country
    {
        public string IsoCode { get; set; }
    }

    public sealed class Address
    {
        public int Id { get; set; }
        public string CountryCode { get; set; }
    }

    public sealed class ApplicationDbContext : DbContext
    {
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            base.OnConfiguring(optionsBuilder);
            optionsBuilder.UseSqlServer("Server=(localdb)\\mssqllocaldb;Database=aspnet-WebApplication-6E483A89-BEE6-4A76-96CC-CEB276E5E112;Trusted_Connection=True;MultipleActiveResultSets=true");
        }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);

            modelBuilder.Entity<Country>().HasKey(c => c.IsoCode);

            modelBuilder.Entity<Country>().Property(c => c.IsoCode)
                .IsRequired()
                .IsUnicode(false)
                .HasMaxLength(2)
                .IsFixedLength(); // Removing this works.

            modelBuilder.Entity<Address>().Property(a => a.CountryCode)
                .IsRequired();

            modelBuilder.Entity<Address>().HasOne<Country>().WithMany().HasForeignKey(a => a.CountryCode).OnDelete(DeleteBehavior.Restrict);
        }
    }

    public static class Program
    {
        public static void Main()
        {
            using (var context = new ApplicationDbContext())
            {
                context.Database.EnsureDeleted();
                context.Database.EnsureCreated();
            }
        }
    }
}

When running this, I get an exception from the database:

Microsoft.Data.SqlClient.SqlException: 'Column 'Country.IsoCode' is not the same data type as referencing column 'Address.CountryCode' in foreign key 'FK_Address_Country_CountryCode'.
Could not create constraint or index. See previous errors.'

If I remove IsFixedLength, everything works properly - both IsUnicode and HasMaxLength are set up on the foreign key to be the same as on the primary key - both columns end up being varchar(2). Since both of these are transferred automatically to the foreign key, I would expect that to be the case with IsFixedLength as well.

This isn't a critical issue of course because we can always specify IsFixedLength on the foreign key manually.

Further technical details

EF Core version: 3.0.0
Database provider: Microsoft.EntityFrameworkCore.SqlServer
Target framework: .NET Core 3.0
Operating system: Windows 10 Version 1903
IDE: Visual Studio 16.4.0 Preview 5.0