Just asking for a link to more details on the integration. Eg. The main release thread on the SmartThings community or the GitHub repo.
I think I found it:
I’m on mobile at the moment so it’s difficult to read through the code at the moment, but my suspicion is that it’s not reporting back the required data to display the album art. I’ll take a closer look when I’m back at a PC and will see if we can make some suggestions to the cast-web-api developer so that it reports back the required data.