UI becomes unresponsive after pressing Back on the vault unlock/password screen

[tobihagemann]

Summary

On Cryptomator Android 2.0.0 (3128), opening a vault and pressing the system Back button while on the password/unlock screen (instead of entering the password) leaves the UI unresponsive/"untouchable" — the app has to be restarted.

System Setup

• Android: 16 / API 36
• Cryptomator: 2.0.0 (3128), F-Droid Edition
• Device: Xiaomi (model 2409BRN2CA)

Steps to Reproduce

1. From the vault list, tap a vault to open the password/unlock screen.
2. Instead of entering the password, press the system Back button.
3. Return to the vault list and try to interact with the UI.

(Reporter observed it opening a second vault; likely independent of which vault.)

Expected Behavior

Pressing Back on the unlock screen returns to a fully interactive vault list.

Actual Behavior

The UI becomes unresponsive/untouchable and the app must be restarted.

Reproducibility

Always

Relevant Log Output

I  ...173952.061  ActivityLifecycle  onCreate  UnlockVaultActivity
I  ...173952.074  ActivityLifecycle  onResume  UnlockVaultActivity
D  ...173952.165  PrepareUnlockUseCase  started
D  ...173952.237  PrepareUnlockUseCase  finished           # unlock/password screen shown
   ...                                                      # ~15s gap (user presses Back)
V  ...174007.330  FragmentLifecycle  onPause  UnlockVaultFragment
D  ...174007.331  ActivityLifecycle  onPause  UnlockVaultActivity
D  ...174007.349  ActivityLifecycle  onStop   UnlockVaultActivity
D  ...174007.362  ActivityLifecycle  onStop   VaultListActivity
D  ...174007.579  ActivityLifecycle  onDestroy  VaultListActivity
D  ...174007.613  ActivityLifecycle  onDestroy  UnlockVaultActivity
I  ...174008.650  App  Cryptomator v2.0.0 (3128) "F-Droid Edition" started   # full app restart
D  ...174008.809  ActivityLifecycle  onCreate  VaultListActivity

Additional Context

Reported via support ticket. Awaiting developer confirmation.