Group Actor Can't Control Show/Hide Anymore In Sequencer in 4.27

I used to make a group and drag the GroupActor into Sequencer to control several actors’ hide or show in one time. But in 4.27 it doesn’t work well - It looks good in Editor, but when you export a video in sequencer or MRQ, you get a wrong result.
It’s a BUG? How can I solve this problem?