I'm not sure if you've fixed this yet, but I followed this article and
updated my phone's app settings for Google Home, Google Play, and
Netflix. That brought the cast button back to my app, but the Chromecast
is still unresponsive to my phone remote...
I've been having is exact same issue, with both reasons you mentioned.
Following this article, I updated my phone's app settings for Google
Home, Google Play, AND Netflix. That brought the cast button back to my
app, but the Chromecast is still unres...