Edited Unassigned: [MvcAttributeRouting]Child actions not being recognized [1369]

This is a regression.

_Scenario_:
Create a MVC template based project and enable MVC attribute routing in it. Decorate the AccountController with a controller-level route '[Route("Account/{action}")]'

_Issue_:
After registering a new user, when I go to the Manage page, I am seeing the following error.

_Error_:
A public action method 'RemoveAccountList' was not found on controller 'WebApplication181.Controllers.AccountController'.

_Attached_ the full error page with this bug.

Note: This repros when the controller has a RoutePrefix and the child action has a route attribute.