When I play videos in eg Dropbox or YouTube, the screen doesn't turn off and the video keeps playing. In other words, the video overrules the "turn off" mode.
In Box it is the other way around. The phone's "turn off" mode overrules the video, causing the video to stop playing after the time-out (in my case 2 minutes).
I already set the battery use of the Box app to 'unrestricted', but this doesn't solve the issue.
I'm afraid it's something that was overlooked by the app developers, but don't know how I can reach them.