Browser Crashs when Opening New Private Tab

Description of the issue: Brave Beta crashs suddenly when opening new private tab with long pressing to new tab button on the bar.

Steps to Reproduce:

  1. Opening the Brave Browser Beta,
  2. Long pressing to the new tab button on the bar at the bottom,
  3. Selecting “New Private Tab”,
  4. …and crash.

Reproduces how often: When tried.

Brave Build and Version: Brave Beta, v1.21 (20.9.10.17)

Reproducible on current live release: Yes (on Beta).

Additional Information: Tried on iPhone 6, 12.4.8.