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Multiple bindings matched from PLC module

I'm developing Xamarin project with MvvmCross with Ninject Adapter. I implemented the NinjectDependenciesProvider as suggested in Wiki:

public class NinjectIosDependenciesProvider : NinjectDependenciesProvider
{
    protected override IEnumerable<INinjectModule> GetPlatformSpecificModules()
    {
        return new[]
        {
            new IosNinjectModule()
        };
    }

    protected override IEnumerable<INinjectModule> GetPortableNinjectModules()
    {
        return new[]
        {
            new CommonDependenciesModule()
        };
    }
}

CommonDependenciesModule is placed in PCL and IosNinjectModule in my iOS project. They are standard Ninject modules:

internal class IosNinjectModule : NinjectModule
{
	public override void Load()
	{
		Bind<IActiveDirectoryAuthenticationService>().To<ActiveDirectoryAuthenticationService>();
		Bind<IBlobCache>().ToMethod(ctx => BlobCache.LocalMachine);
		Bind<ISecureBlobCache>().ToMethod(ctx => BlobCache.Secure);
		Bind<IAnalyticsTrackingService>().To<AnalyticsTrackingService>();
	}
}

public class CommonDependenciesModule : NinjectModule
{
    public override void Load()
    {
        Bind<IRoomReservationService>().To<MockedRoomsListReservationService>();
    }
}

As you can see no bindings are overlapping.

When MvvmCross is trying to resolve the IRoomReservationService type to create a view model I receive the following error:

Error activating IRoomReservationService
More than one matching bindings are available.
Matching bindings:
  1) binding from IRoomReservationService to MockedRoomsListReservationService
  2) binding from IRoomReservationService to method
  3) binding from IRoomReservationService to method
Activation path:
  2) Injection of dependency IRoomReservationService into parameter roomReservationService of constructor of type RoomsListViewModel
  1) Request for RoomsListViewModel
Suggestions:
  1) Ensure that you have defined a binding for IRoomReservationService only once.

Two matching bindings to methods are complete mystery for me. Any clue what might be the cause?

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