So how does idntt work exactly?

I really like some of the idntt members and some of their music (esp yesweare) but one of, if not my favorite things about kpop is seeing the members all together, interacting with each other and being friends lol.

Does idntt's concept mean that the members are 'switched' occasionally within the three (?) "groups"? Because knowing myself, I think I wouldn't really enjoy a comeback where my biasline isn't together lmao.

Do I understand it correctly? How does their concept work exactly?