Gnome Web problem with Alt-key

I installed the Gnome Web browser and like it very much. But I have a little problem with writing the “@” sign. On the German keyboard I have to use the right “Alt-key” together with the letter “q”. But this does not work in Gnome Web. The right Alt-key seems to have no function there.
In Webpositive the “@” works as expected. This issue is only in Gnome Web.
This is a really minor problem, I know. But I am interested to know what happened here. Does anybody else have this problem?

Yes. Tracked at GTK apps ignore Altr-Graph Keys · Issue #7797 · haikuports/haikuports · GitHub


Thanks a lot!