Board Game Arena

Ah ok so it is random just a low probability run of games. I was wondering if it prioritized the higher ELO player to go first as it seemed strange considering how significant the disadvantage is of going 2nd in muggins.

Does anyone know how the starting player is decided in Arena?

In my last 10 games I've only gone first twice. Is this just unlucky or is there a deciding factor to this? I've found starting a game 2nd is often a big disadvantage.