Multi-window: prevent the out-of-focus app from pausing?

Android 7.0 introduced the native multi-window API which allows apps to be viewed in split-screen mode globally. However, in actual usage, one downside prevents it from being as useful as some users would imagine. Many apps, when in the multi-window view but not in focus (i.e. user is interacting with another app in the multi-window view), pauses its activities: IM apps would no longer update incoming messages; music/video apps would pause playback; games would not proceed with their actions. The official developer guideline [briefly mentions](https://developer.android.com/guide/topics/ui/multi-window.html#lifecycle) the pausing behavior, and from what I understand, apps need to be programmed with this in mind so as to not exhibit it. But is there a way I can force the way around the limitation as a user? From what I've heard from fellow users, certain manufacturers' Android forks such as MIUI do not show such pausing whatsoever. **TL;DR: Can I prevent the out-of-focus app from pausing in multi-window?**