That’s a good work around for a fundamental issue with the app, but how reliable is it? I wish there was a blanket method to disable internet connectivity for an app, rather than relying on a firewall (IIRC they’re pretty leaky, and I struggle to maintain anything that’s always-on) or custom DNS server.
Is this stock Android? I don’t have this option on mine, as far as I can tell. The closest I have is “Allow background data usage”