I just installed the app and tried doing that (android) and it's working fine. I created the wallet -> went to "Security" tab --> clicked "back up" and it's showing me the seed phrase just fine (6 words, then you click continue to see the other 6).

But as an alternative, you can check Electrum (for android) or Unstoppable wallet.

I just installed the app and tried doing that (android) and it's working fine. I created the wallet -> went to "Security" tab --> clicked "back up" and it's showing me the seed phrase just fine (6 words, then you click continue to see the other 6).