Firebase Test Lab can't record page scroll event in script recording

I'am trying to record a script. Every things is ok but when I try to scroll page, recorder is not responding and record nothing. I tried that in page with RecyclerView and ScrollView.

When I looked at test result in firebase console and watched the video, when the script is over and start the random test, pages can scrolling. So I thing there is a way but I can't find what it is. Please help.