OData Controller: Wrong methods called (.NET Core) - entity-framework-core

Question

public class Account
{
[Key]
[StringLength(80)]
public string AccountID { get; set; } = string.Empty;
[StringLength(255)]
public string Name { get; set; } = string.Empty;
[ForeignKey(nameof(AccountID))]
public virtual ICollection<Relation> Relations { get; set; }
}
public class Role
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.None)]
public long RoleID { get; set; } = -1;
[StringLength(80)]
public string RoleName { get; set; } = string.Empty;
}
public class Relation
{
[Key]
[StringLength(80)]
public string AccountID { get; set; } = string.Empty;
[Required]
public long RoleID { get; set; } = 0;
[ForeignKey(nameof(RoleID))]
public virtual Role Role { get; set; }
}
public class AccountsController : ODataController
{
private readonly DS2DbContext _context;
public AccountsController(DS2DbContext context)
{
_context = context;
}
[EnableQuery(PageSize = 20)]
public IQueryable<Account> Get()
{
return _context.Accounts;
}
[EnableQuery]
public SingleResult<Account> Get([FromODataUri] string ID)
{
var result = _context.Accounts.Where(
e => string.Compare(e.AccountID, ID, StringComparison.InvariantCultureIgnoreCase) == 0);
return SingleResult.Create(result);
}
}
The controller is called by a grid which is querying a list of Account records as well as code that reads a single Account record with a given account id.
List query:
https://localhost:44393/DS/Accounts?$count=true&$expand=UserInfo,Relations($expand=Role)&$skip=0&$top=20
Single record query:
https://localhost:44393/DS/Accounts('bt0388')?$expand=UserInfo,Relations($expand=Role)
As long as the SingleResult<Account> Get() method is commented out, the list query ends up in IQueryable<Account> Get() as it should and the query works fine.
As soon as I uncomment SingleResult<Account> Get(), the list query ends up in the SingleResult<Account> Get() and fails.
The single record query never reaches SingleResult<Account> Get(). Omitting the $expand parameter doesn't change anything.
What is going wrong here, and how do I fix it?