Some links cannot be opened with custom tab

[oppressor1761]

Description: opening certain links with custom tab causes black screen

Steps to reproduce:

1. Enable Open External links in incognito
2. Open decrypt.day in X with custom tab

Result: black screen

When disabling Open External links in incognito the link can be opened

Vanadium 148.0.7778.167

[oppressor1761]

Reproduction video

https://imgur.com/a/Te1PPRE