[sonofdibnah]

I'm not entirely sure, use Kodi's feature to upload logs and post the link here or open a new issue on GitHub. Maybe it is, maybe it's not, I can't really tell.

Thanks for trying to help but I've sorted this out for myself. The clue came when I did a clean install of Coreeelc and Amazon VOD on an SD card and it worked. After a bit of trial and error on my full Coreelec setup, it turns out that I'd enabled "Use H.265 Videocodec" in your add-on's General Settings. My setup can't cope with this setting, but would let me watch tennis replays (which, presumably are only H264).

Everything's back to normal now that the H265 setting is unselected.

Many thanks for your work on this great add-on.