Metadata: Convention does not create relationship after Fluent API resolves ambiguity

[smitpatel]

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

    public int ApplicationUserId { get; set; }
    public ApplicationUser ApplicationUser { get; set; }
}

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

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    // Configure model
    modelBuilder.Entity<Friendship>();
}

Above model works but below one fails

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

    public int ActionUserId { get; set; }
    public ApplicationUser ActionUser { get; set; }

    public int ApplicationUserId { get; set; }
    public ApplicationUser ApplicationUser { get; set; }
}

public class ApplicationUser
{
    public int Id { get; set; }
    public IList<Friendship> Friendships { get; set; }
}

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
    // Configure model
    modelBuilder.Entity<Friendship>().HasOne(e => e.ApplicationUser).WithMany(e => e.Friendships).HasForeignKey(e => e.ApplicationUserId);
}

Exception thrown:

Unable to determine the relationship represented by navigation property 'Friendship.ActionUser' of type 'ApplicationUser'. Either manually configure the relationship, or ignore this property using the '[NotMapped]' attribute or by using 'EntityTypeBuilder.Ignore' in 'OnModelCreating'.

The only difference between 2 models,
First one does not have ambiguity in relationship discovery. Second one has ambiguity but it is resolved by fluent API code but convention did not run correctly afterwards.