However, if it still works just as sidebar than there is another solution as below.
Just install an additional module called flying Android. Enable it. Reboot. Now, start your Xmultiwindow to play and see if it works!!!
Now, insert unlimited apps into your Xmultiwindow and you can play with split multi-window whenever and wherever you want!!!
Once you start to play with split multi-window, you can now disable flying android if you donít want it anymore. Just uncheck the flying android module from Xposed framework and Reboot your phone. You should still be able to play with split multi-window with the help of Xmultiwindow.
Thanks to devs of Xposed framework, Xmultiwindow and flying android.
Thanks me if i helped you....
(Post here if it does not work!!!)
Have a nice androiding.....