Matchmaking to the wrong server region when in a party

So I tried opening a support ticket, but the EA chatbot is utterly useless, and either keeps doing circles answering the same questions or takes me to an irrelevant article, so I figured I'd ask here instead and hope for a real answer.

I have a few friends I play with who live in Europe (I live in the Western US, as do most of the friends I play the game with). Any time one of my EU friends joins my party, we get automatically connected to EU servers, no matter if the party is majority US or not. Isn't the matchmaking supposed to be based off the location of the party leader? That's how it always seems to work when I'm in a party with only US players, as it will select a server closest to the party leader (East US, Central US, or West US).

Is there any way I can force the MM to prioritize US servers when I'm the party lead?