[Bug]: Signature insertion fails after clicking sign button in headless mode

[CynthiaKang]

Version

1.48.2

Steps to reproduce

1. Use Playwright in headless mode with mobile emulation (iPhone 14).
2. Navigate to a page with a signature workflow.
3. Click the "Sign" button using Playwright.
4. Attempt to insert or draw a signature using Playwright commands.

Expected behavior

The signature input area should be interactable and the signature should be inserted successfully.

Actual behavior

In headless + mobile emulation mode, the automation script fails to interact with the signature input area after clicking the "Sign" button.

Additional context

Environment

- Playwright version: 1.48.2
- Python version: 3.10.11
- Browser: Chromium (default from Playwright)
- OS: macOS 15.6
- iPhone:14