Not long ago, if you were on a tab in Vanadium opened from a link in another app, when you were done with that tab you could use the Back gesture or system-wide navigation button to both close the tab and go back to the other app. Recently, this behavior changed so that the tab no longer closes. Is this a bug in Vanadium, or an upstream change from Chromium that I should report/search on their (awful) issue tracker?