Wally Wallet Android 3.3.3 Update Released! 
Navigation bar issue has been addressed with testing ongoing across various devices due to recent Android API changes.
Resolved the issue causing the app to hang, particularly for users with larger wallets and slower devices.
Make sure to update your NEXA wallet to get the latest improvements.
Download/update link:
https://play.google.com/store/apps/details?id=info.bitcoinunlimited.www.wally