App crash when rapidly tapping the back button multiple times.

### App Version / Build Number

2.2.1

### Device

ASUS ROG Phone 9

### Android Version

Android 16

### Describe the bug

App crashes when rapidly tapping the back button multiple times.

### To Reproduce

Scenario 1:
1. On the main menu tap Track.
2. Tap the Add account(+) button.
3. Tap agree (v) button.
4. Tap the back arrow repeated/quickly.
5. Observe the app behavior.

Scenario 2:
1. On the main menu tap Setting icon.
2. Tap the back arrow twice.
3. Observe the app behavior.

### Expected behavior

The app should navigate normally without crashing or showing white screen.

### Actual behavior

The app displays white screen and crashes after rapidly tapping the back arrow in different screens.

### Frequency

Always reproducible

### Severity

Blocker - App crashes or data loss

### Network Conditions

Wi-Fi

### Screenshots / Screen recordings

https://github.com/user-attachments/assets/47f155dc-2ce9-4505-a4aa-41a491352b5a

https://github.com/user-attachments/assets/85e44ced-d6c8-475a-97b7-79ea44e85a87

### Logs

```shell

```

### Additional context

This issue might be related to the white screen issue observed during language change.

Start by reproducing both scenarios on Android 16 with app version 2.2.1: Track > Add account > agree, and Main menu > Settings. Trace the back-arrow handling in those screens and compare it with the reported white screen during language change. Done means repeated back taps navigate normally without a white screen or crash.

Written by the indexing model from the issue text.