Clearing the site cache and calling wayfinder uncached seems to solve the problem. I have done some more tests and now it works!
Well, the problem with the 2 differnt domains is the following: our old site was under telebaern.ch. For the relaunch of our new website, we thougt, that telebaern.tv is better because we are a tv station
The primary is always telebaern.tv but you are right, telebaern.ch should redirect to the .tv domain instead of just holding the same content. I have to talk to our it guys how to set this up correctly, I’m just the guy who has to care about the website and my knowledge about all that technical stuff is limited.
Thank you for your help and your advice!