[PM-39124] Unable to autofill item with master password reprompt

### Steps To Reproduce

1. Navigate to a site where you have a vault item with master password re-prompt enabled
2. Attempt to autofill the item
3. Unlock your vault
4. Select the item to autofill
5. Enter your master password for the master password re-prompt

### Expected Result

Item is filled

### Actual Result

Item is not filled and Bitwarden closes

### Screenshots or Videos

https://github.com/user-attachments/assets/e38c379c-3e2a-4371-8601-096714312048

### Additional Context

_No response_

### Build Version

2026.5.1 (3271)

### What server are you connecting to?

US

### Self-host Server Version

_No response_

### Environment Details

- Device iPhone 13
- iOS version 26.5

### Issue Tracking Info

- [x] I understand that work is tracked outside of Github. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.

Reproduce the failure on an iPhone using an item with master password re-prompt enabled, following the listed autofill, vault unlock, item selection, and password steps. Trace the iOS autofill flow through the re-prompt and verify that the item is filled instead of Bitwarden closing.

Written by the indexing model from the issue text.