@anrdaemon We know, what @Pesala is saying is that typing and pressing Enter uses the same tab, thus pasting and pressing Enter should also use the same tab so it's consistent.
And that's the name of the feature, Paste and Go, not "Paste and Go in another tab".
And as I said, that's an extra setting also in Presto Opera, even Presto default is like Vivaldi. So we came to the conclusion that it's not a bug, but a feature request.