トラックミキサーにエフェクトを入れて使用すると、スクラブで音を探す時に明らかに再生がスムースさに欠けてるのは、仕様なのでしょうか？

Hey there,
Thanks for bringing this up. Based on our current understanding, the reduced smoothness when scrubbing with effects enabled in the Track Mixer is expected behavior and not a known issue. Effect processing can affect real-time playback responsiveness during scrubbing.

Thanks,
Kevin