Android TV and Jellyfin

I’ve just installed Android TV direct from Google Play onto the latest Humax Aura Android PVR. I’ve installed and used the same Android TV on mine and other Android phones without any problems, playing from my server both inside and outside my home network.
Unfortunately when I do start to play videos on my Aura, the whole thing freezes.
I suspect I am amongst the first to try Jellyfin on the Aura and its early days for feedback from users. Kodi works fine. Any ideas what I should be looking at?