s4 multiwindow

[AC Question]

before i could watch 2 videos at the same time in multi window but now when i try it wont let me. one window i would be in gallery watching a video and in the other i would have mx player to watch vid, but it doesnt work

 

[STARGATE]

I don't have my GS4 anymore so I can't test it, but I remember I was able to do it too.
Maybe an update messed it up.

Sent From Another Galaxy