If i takes more the 10 sek to load the playback session somethin is wrong.
Restart the app: Fully close and reopen it.
Update the app: Make sure you’re using the latest version.
Check your network: A weak Wi-Fi connection can cause delays. Restart your router if needed.
Restart your devices: Reboot both your phone/tablet and Sonos devices.
Minimize network interference: Ensure other devices aren’t overloading your network.
Clear cache: On Android, clear the app cache in settings.
Reinstall the app: This can fix issues caused by corrupted files. (remember to restart your phone before reinstalling the app) That is what solved the problem for me.