Device: Ipad 6th generation
Operating system: 15.4.1
so from my understanding when I use the spoilers and reversers the spoilers are not supposed to retract until 40 kts. but here in the video you see the spoilers are being retracted when I stop using the thrust reversers. this has been also happening in the Boeing 757, A330, and 777-200ER.
here is the link
Disclaimer:the flying that you see was done on the casual server