I have been relentlessly struggling to get Pandora (p) to work on chromecast audio (ca) for close to a year now. I've probably spent 20 or hours messing with this. I love P but without ca it's useless to me. I have followed all the recommended fixes and a couple times it worked for a few hours then reverted. I suspect google is blocking p somehow, they are promoting youtube music pretty hard. my moto e5 will connect to ca but p freezes and it's over. I've tried everything. I was a paid subscriber but had to drop it. PLEASE FIX THIS!
I see that everyone else is having the same problem I am with Pandora freezing up on the intro screen with chromecast and never working. This has been going on for months and Pandora has done nothing about it. Pandora was one of the few things I still had faith in and this past year they have just gone completely downhill :(... I guess I'll be trying out some new music apps and if they work better then I'm canceling the subscription I've had with pandora for the past many years. So disappointed
Yes. The maximum number of supported devices connected to one single Wi-Fi network when chromecasting will depend on its speed of internet connection as well as signal strength available at time of transmission request being made as slow speeds/intermittent signal could lead towards interruptions/disconnects which would make sending content over impossible. You should try connecting at least two devices initially before attempting bigger ventures accordingly.
Are you able to identify specific IPs/domains the chromecast should have access to? I'm thinking you could try and create a security policy with the chromecast as the source IP and limit the destinations.