@Vivaldi I use the same blocker lists on both computers. Now, my work machine has Windows 11 and my home machine uses Manjaro Linux. Not sure if that makes a difference.

Oddly I don't have issues with Vivaldi on Android, so I don't know if there's a difference between mobile and desktop sites.

If this is a known issue, have you considered finding existing lists and adding them by default to Vivaldi? Would that help in more people utilizing your built-in blocker? Are there any plans to improve or make it more robust so that we don't need to use extensions like UBO?