Constantly getting dropped to the rank below your current rank

I am constantly getting dropped down in division rivals vsa .like i am in world class 3 and have 445k fans and next I find myself in pro 1 with around 340k fans and is happening now every season. And because of it I can't advance to the next rank and i am now only playing vsa to claim quests and not for fun but more to get better rewards and complete quests faster.