Opening two tabs with google.com result in "Unknown error while getting elements"

[Hi-Angel]

Version info:

qutebrowser v3.1.0
Git commit:
Backend: QtWebEngine 6.7, based on Chromium 118.0.5993.220 (from api)
Qt: 6.7.0

And it's also tested with latest main branch.

Does the bug happen if you start with --temp-basedir?:

Yes

Description

See steps to reproduce.

I think it's a regression because I haven't see it before. Idk what component regressed though.

I think this is different from #7662, for one because that issue seems to have been related to a WebEngine bug that was fixed.

How to reproduce

1. Launch qutebrowser --temp-basedir google.com google.com

   Qutebrowser with two tabs should get opened

2. Type into the search box test and press Enter

3. Press f to make hints appear over the results page.

Expected

Hints should appear

Actual

Qutebrowser prints Unknown error while getting elements

[Hi-Angel]

Fixed the title (while writing this issue I found a better way to reproduce).

FWIW, "steps to reproduce" isn't the only way to get this. I don't have a habit of having multiple google pages among opened tabs, but I still routinely get the error. It usually happens when I repeat search within the same tab. For some reason though, with --temp-base-dir it does not happen, but it still can be reproduced with the steps I wrote in the post.

[The-Compiler]

Reproduced, fails with Uncaught TypeError: Cannot read properties of undefined (reading 'webelem').

Seems to work fine with Qt 6.6, so this might be another QtWebEngine 6.7 regression...