I've been having the same issues mentioned here, although I've been on firmware 37.
After reseting the device the first time (speaker wasn't casting to Spotify), it was no longer able to register with Google Home on Android. A Reddit search led me to learn that borrowing someone's iPhone may help, which it did. At least it was no longer bricked and could access the internet.
For music, I get "sorry something went wrong. Give it another try." Spotify Connect no longer sees it. Moreover, the Soundcore app doesn't recognize the speaker anymore.
This is definitely a firmware issue, and I hope they can update it soon. My phone and the speaker are, naturally, on the same network. Fortunately Bluetooth still works, which is better than nothing for now, but there are some serious issues going on.
I'm a beta tester and received it back in early October 2018.
System firmware version: 37
Cast firmware version: 1.32.129357