Notifications sidebar links not honouring default web app setting

This is not just an issue with the current Beta but has been ongoing for a while. I have set my default web app to be Safari Technology Preview and all link, be it via an email, etc open it properly except the Notifications sidebar. When I get a notification from a site I follow it opens the normal Safari browser, not my default app. I have tried it with other web browsers and it still opens Safari.


Has anyone else come across this or have a solution?


Thanks

RC