How to make route patterns work?

[xperiandri]

I use Orchard Core Framework without CMS.
I register a route inside module startup class as follows

routes.MapAreaControllerRoute(
    name: "Bitrix24.Tenant",
    areaName: "Bitrix24.Tenant",
    pattern: "{controller}/{action=Index}"
);

But it does not work.

The only way it works is only with an explicit route like

routes.MapAreaControllerRoute(
    name: "Bitrix24.Tenant",
    areaName: "Bitrix24.Tenant",
    pattern: "Home",
    defaults: new {controller = "Home", action = nameof(HomeController.Index)}
);

How to make patterns with variables work?

[xperiandri]

Interesting, after I started the app with

routes.MapAreaControllerRoute(
    name: "Bitrix24.Tenant",
    areaName: "Bitrix24.Tenant",
    pattern: "{controller=Home}/{action=Index}"
);

it started to work.
Then I switched back to

routes.MapAreaControllerRoute(
    name: "Bitrix24.Tenant",
    areaName: "Bitrix24.Tenant",
    pattern: "{controller}/{action=Index}"
);

and it works too