nested engines cannot render components

I am trying to create nested engines (with routes) like this:

Host App
    mounts: Engine A
    mounts: Engine B

There are components in both engines. Host app can render components from both engines and everything works fine. However once I add Engine A as dependency of engine B like this:

        mounts: Engine A
        mounts: Engine B
            mounts: Engine A

Component from engine A cannot be rendered in route in engine B: "Attempted to resolve component-a, which was expected to be a component, but nothing was found."

Are nested engines supported or do you have any idea, what might be wrong?

thanks a lot