ストームには修正ありって公式がツイートしてるけど、

Later circles now move as they close in all of Battle Royale, similar to Competitive play. We've adjusted all moving storms and later circle timings.

We've also re-enabled Dynamic Storm Circles to conditionally vary the time between zones.

通常マッチでも安地が早めに動き始めるのとタイミングの調整と、あと収縮の間隔がランダムに変化するのかな？