The way I remember it, in Original Sin 2 the turns switch between the participating parties regardless of the initiative differences between the various combatants. ... It's honestly exceptionally stupid and one of the design decisions that, in my opinion, gets overlooked way too frequently whenever people want to criticise the game.
Before this was changed to the current implementation, there were many topics about how it wasn't fun to have the entire party go first and make combat trivial, or to walk into an ambush and be wiped out without a chance to do anything.
