Does your most played agent give you an advantage when you play roulette or am I just lucky?

I enjoy playing roulette when my team is open to it and so far I have never lost when it comes to Chamber. I am a Chamber main and have the most hours as him. I was wondering whether the game compares statistics of each player and assigns the roulette character to the player with the most hours on that agent or something?

When I did roulette with a character I hadn’t played as much, Reyna, I lost and got Clove, who I had only played once before. So I assume the remaining assigned characters are random, or at least aimed to have a role balanced team.

So is there some kind of system or am I just lucky for never losing Chamber roulette?