Does the collision filter of two objects disappear when I join them?

I have two objects which, by their collision filter/masks definition, shouldn’t collide… however, when I do a weld-joint on them afterwards, it seems they do start to collide? Can anyone explain? I might be doing something wrong with the joint…

thanks! [import]uid: 10284 topic_id: 4438 reply_id: 304438[/import]