Issue with 3rd party COM-object

Dear colleagues,

1. We have a third-party COM-object.
2. COM-object was succesfully mounted into 1C: Enterprise by:
mgAPI = New COMObject("mgAPI.mg_API");
3. Mentioned COM-object has several internal interfaces with some set of methods for each of them.
4. After creation of COM-object exemplaire in 1C (point 2) we have
available methods of its default interface (coclass mg_API {[default]
interface IMGApplication;}
5. Other interfaces methods are not availble after COM-object creation
in 1C by default.
6. All interfaces of COM-object are inherited from classical
IDispatch. But methods Invoke, GetIDsOfNames and others inherited
methods of IDispatch are not available in 1C (1C returns an error
message that method does not exist).

Main question is: does 1C plattform have an ability for access to
other interfaces (point 5) methods of such a COM-object?

Thank you in advance for suggestions of solution.

Sorry for the long delay. According to the documentation, it supports one or more interfaces. If you think, that the behavior is incorrect, please provide an example that reproduces an error.