I have recently upgraded to v3.9.13567.0 of 360 desktop app and found this issue. Basically, if you include videos with audio on slide layers and if you revisit the base layer then the audio from all of the videos on each layer starts playing automatically. This is only happening when the video is set to play automatically. If I set the videos to play on the trigger then it works fine.
Also sometimes the base layer does not replay the slide objects especially when you set the base layer to "Automatically decide" when revisiting.
I have attached a sample of the story file so that the testing team can replicate the behavior