Same issue here, except I am also unable to cast to a regular Chromecast either (intermittently). I reported the issue to Rogers and spoke to 2nd line support. Received an email back a couple of days later to say they couldn't replicate or pinpoint t...
I have the same issue with the German cc. Makes no difference whether I turn it off or on in the settings. Indo not have the same issue when using Prime on any of my Samsung TVs.