SUMX producing wrong result when filtered in both row context and filter context

Yea like I said, his solution works. I'm just super curious why the values or distinct version does not, because in most cases (where you dont have the owner in a filter AND in a visual) it works just fine! As far as I can tell, there is no good reason for SUMX to fail here...

Edit: Alberto gets it. It's not the solution I'm looking for, it's the explanation / bugfix 🙂